CHNSpec Technology （Zhejiang）Co.,Ltd Company News

Most of the color detection instruments on the market can only detect the color of the product at room temperature. However, such as candles, biological culture, chemical catalysis and other special industries, there are strict requirements for temperature, and the relevant characteristics of products need to be detected under specific temperature conditions or long-term constant temperature conditions. For these industries, Color Spectrum Technology has launched a heating tool for benchtop spectrophotometer series, which is specifically used to detect the color of products that need temperature control.   Figure 1: Heating fixture   Figure 2: Instrument end, heating temperature can be set     The heating device is shown in Figure 1, which mainly contains two parts, one is the heating tube, and the other is the thermocouple. The thermocouple is mainly used to monitor the temperature and transmit the temperature data to the instrument, so that the actual temperature is controlled at the temperature set by the instrument.   After the verification of R & D personnel, the heating temperature set by the instrument is consistent with the actual heating temperature. This function can help enterprises accurately measure the color data of the corresponding temperature, so as to help enterprises achieve the purpose of controlling product quality.   Figure 3: Verifying the consistency of the heating temperature with the set temperature   When it comes to actual measurements, there are two ways to choose from. In the first way, the first external heating to the measured temperature, and then pour to the cuvette, the heating fixture plays the role of temperature control, color measurement of the product. For example, candles can be heated by water baths.   Figure 4: Heating the candle by means of water bath heating   In the second way, the product is directly poured into the cuvette and heated to the corresponding temperature with a heating fixture, which takes longer time.   Figure 5: Direct heating using a heating fixture   At present, the desktop spectrophotometer CS-820N/821N/826 of color spectrum technology can realize the above heating function. The highest temperature of the heating module is 100℃. If you need to measure higher temperature, you are welcome to find us to customize.  

The haze meter of color spectrum must be known to everyone. Do you know the difference between these five types of haze meters? Now let me introduce these five brothers to you! ~   Haze meter TH series:   Haze meter TH-09: ASTM single standard, in line with test standards: GB/T 2410, ASTM D1003/D1044, haze repeatability 0.1, machine storage data of 10000, measuring diameter 21mm, and attached to the third party verification report.     Haze meter TH-100: TH-100 and TH-09 the biggest difference is: the use of double standard ISO&ASTM, in line with the test standards: GB/T 2410, ASTM D 1003, ISO 13468/14782; Haze repeatability 0.08; The machine can store 20,000 pieces of data. Other things are the same.    TH-110: The screen of TH-110 is upgraded to a large screen touch screen, Android operating system, which can realize mass storage; Repeatability of haze 0.05; With 21mm/7mm measurement diameter; Also adopt double standard ISO&ASTM, in line with the following test standards: GB/T 2410, ASTM D1003/1044, ISO 13468/14782, attached to the third party verification report.   The above three haze meters/haze meters are suitable for plastic, film, glass, LCD panel, touch screen and other transparent and translucent materials, one-stop measurement solutions for haze and transmittance. It meets the haze and transmittance measurement under three standard lighting sources, CIE-A, CIE-C and CIE-D65. It uses LED light source, has a long life, and does not need to be replaced for 10 years. It has an open measurement area, which can meet the sample measurement of any size. It has two measurement states: vertical measurement and horizontal measurement. The instrument does not need to be preheated, and the results can be obtained in 1.5 seconds.   Haze meter CS-700 series:   Color haze meter CS-700: 1. More measurement parameters than TH series: total haze, total transmittance, spectral transmittance, transmission color; 2. Meet the double standard ISO&ASTM, follow the following standards: GB/T 2410, ASTM D1003/1044, ISO 13468/14782; 3. Large screen touch screen, Android operating system 4. Attach a third party verification report   Definition fog shadow instrument CS-720: The only difference with the color haze meter CS-700 is the additional "Clarity" measurement parameter   The above two products are in accordance with ASTM and ISO haze measurement standards, following the standards: GB/T2410,ASTM D1003/D1044,ISO13468/ISO14782. It provides A, C, and D65 choice of measurement light sources for haze measurement, and 24 kinds of measurement light sources for color measurement. The compensation measurement method can realize the compensation measurement of transmittance and provide more accurate transmittance test results. Provide powerful haze, color, transmittance, clarity measurement analysis software, can be operated on the computer side and print test report. Android operating system, touch screen, to achieve more convenient operation, more smooth experience, open sample warehouse, can liberate the sample size limit, you can according to different samples for horizontal or vertical measurement. Provide a variety of fixtures to meet the measurement needs of different forms of samples of sheet and liquid. With comprehensive color parameters and clarity parameters in the industry, it can measure dozens of color parameters such as Lab, yellowness, whiteness, Gardner, platinum and cobalt color.   Understand the introduction of the product, then let's focus on the comparison of their parameters.   I believe you have a further understanding of our products, is not deeply attracted by their advantages, welcome to pay attention to us oh ~

Spectrophotometers are color measuring devices used to specify and communicate colors and monitor accuracy throughout the production process. Spectrophotometers measure almost anything, from liquids and plastics to paper, metals and fabrics. Brand owners, designers, laboratory technicians, and quality control professionals in almost all industries rely on these devices to ensure that color is consistent from specification to final quality inspection.   Choose the right spectrophotometer for your workflow.   Since desktop equipment is usually more expensive, many people wonder if the equipment investment is worth it. Today, we'll compare how portable and desktop colorimeters perform in common color measurement situations, so you can decide which one is best for your needs.   Overall comparison: desktop VS portable   Desktop devices are known to be more accurate and consistent than portable devices. Benchtop devices are often preferred when using strict tolerances or when formulating color specifications. Benchtop equipment is used for specification, formulation, and quality control by color professionals who must match the colors of a brand or its manufactured components at the time of final assembly. At the same time, the portable device is suitable for spot checking quality in the laboratory, or can be carried around to measure color anytime and anywhere for design inspiration.   Application comparison: How to use a desktop or portable spectrophotometer   1 -- Measure the transmission If you want to measure liquids like orange juice, laundry detergent, or shampoo, desktop devices offer something that portable devices can't - transmission measurement. This is computed through the measured object. You can also measure the transparency and haze of plastic and packaging (such as 2-liter bottles and clear blister packaging) to ensure that the opacity is accurate.   2 -- Make the color paste Desktop devices are the first choice for formulating color recipes. It is also widely used to prepare different degrees of opacity in plastics, to prepare liquid dyes for textiles and color pastes for paints.   3 - Set standards Setting standards is a very important step in the color program. If you set the wrong color, how can you expect it to be accurate in production? When precise accuracy is required, benchtop instruments are often the first choice for setting color standards because they ensure repeatability and reproducibility of color accuracy.   4 - As part of a group of instruments If you work with color management across regions, or use different instruments in your lab, you need to consider repeatability and consistency between each instrument. Even though measurements from the same instrument may vary slightly from case to case, the range of differences can be magnified when you're dealing with multiple instruments.   The benchtop instrument is designed to achieve accurate color repeatability, making the correlation between different devices higher. Although our portable devices are also excellent, there can be a 0.13 difference in portable devices at the high end of the market.   5 - Take it with you in the lab Without a doubt, portable equipment is the best choice outside the laboratory. They are very useful for production spot checks to ensure color consistency throughout the run. It can also be used in the field to obtain color information used in the design or to perform quality checks at the supplier's site. Many devices provide Bluetooth connections that allow instant color analysis, while others plug into the main computer to download data.   6 - For quality control While many people believe that portable spectrophotometers are suitable for quality control because of their portability, there are other things to consider.   First, measure the size of the point. In an ideal world, our 6 mm single point and 25 mm single point measurements would be identical. However, if the sample has small defects, such as tiny scratches, lint, dirt, or dust, this defect will occupy a large part of the small measurement area, returning erroneous measurements. Texture and orientation differences and sample imperfections also affect the results. Benchtop devices tend to measure larger areas and can average out defects better.   Second, the backing. Unless the sample is completely opaque, anything behind the sample at the time of measurement may reflect and alter the result. The desktop comes with a built-in backing, so it does not have to be considered. When using portable devices, the portability is excellent, but you also need to use a backing to get consistent results.   7 -- Measure fluorescent whitening agent One final consideration: if you're dealing with fluorescent brighteners, you'll need to use UV-calibrated instruments for consistency. This is common for desktop devices, but some portable devices can also perform UV calibration.   So, which one do you choose?

Using wallpaper to decorate the interior is currently a more popular kind of decoration, this decoration is not dry and fashion sense. However, the use of wallpaper for interior decoration, sometimes it is easy to produce color difference, which is very normal, it is because of the existence of color difference that the interior space has a distinct sense of hierarchy, to achieve the ideal effect. However, when the color difference exceeds a certain limit, it does not meet people's wishes, and at this time, the color difference needs to be adjusted.     To solve the color difference problem caused by wallpaper in interior decoration, we must first understand the causes of color difference in order to provide targeted solutions. In summary, the causes of color difference are roughly as follows:   ——Why——   1, the color difference of natural materials: such as the color difference of natural materials such as straw, paper and cloth fiber itself, this color difference is inevitable, and it is not a product quality problem.   2, the color difference caused by the manufacturing process: such as temperature and humidity changes, paper base thickness, density, water absorption, production batches, equipment maintenance and other reasons, may also lead to color differences.   3. Color difference caused by improper construction: such as wet cloth wiping wallpaper fading;The scratch plate scratches the joint black, the glue overflows and causes the joint white and a white edge.   4, other reasons such as light, Angle, light source, human eye judgment and other subjective factors, resulting in wallpaper color difference in the decoration process.   ——How—— After knowing the reasons for the color difference caused by the use of wallpaper decoration, you can take appropriate measures to control the color difference for the above reasons.   1. Understand clearly in advance when selecting wallpaper to reduce the aesthetic color difference problem of wallpaper in the later period.   2. Before construction, cut three upper walls to see if there is an obvious color difference problem. If the color difference is not obvious, it is safe to use, and otherwise coordinate with the business.   3, a good horse with a good saddle, the purchase of wallpaper must be wallpaper color inspection to avoid quality problems.   4, wallpaper scraping moderate strength, before the construction must pay attention to wall treatment, wallpaper in the construction, must be gradual, do not be impatient.   The above color difference problem, you can use the color difference meter to detect the wallpaper color difference, generally see L, a, b three values, which respectively represent black and white, red green, yellow and blue, only the color difference value in a certain range (tolerance value) is qualified, the operation is simple and convenient.     The interior decoration of the house is closely related to personal aesthetic taste, and the use of color difference meter to effectively check the color difference of the wallpaper can quickly and efficiently create the indoor effect you want. Especially for some color difference is not obvious but there are color differences in the wallpaper, only through the color difference meter can detect the color difference between the wallpaper, more accurate and efficient to assist the entire process of wallpaper decoration.

I see that some netizens often ask online: How about the quality of H&M clothes? I would say: not so! This time we went to the mall and bought jeans from H&M. We're going to test them for color fastness and color fastness. What is color fastness? Color fastness is the ability of pigment to maintain its original color. It is the degree of discoloring of fabric under the action of external factors (extrusion, friction, water washing, rain, exposure, light, seawater impregnation, saliva impregnation, water stain, sweat stain, etc.). (Color fastness is graded on a scale of 1-5, with 5 representing the best quality and 1 the worst.) Now, let's test the color fastness of H&M denim: Color fastness testing process: Test the Lab value of the clothes when you first buy them: After washing, dry the clothes to test the color Lab value: The color fastness index of H&M's clothes is 2 Conclusion: The color fastness of H&M denim is level 2, which is equivalent to 40 points (out of 100), failing!! (Note: The test instrument in the figure is ColorMeter MAX)

Gloss is a property of the appearance of an object. Glossiness describes the spatial geometric distribution of reflected light on a material surface. There are various methods to measure the glossiness of the sample surface, and mirror reflection is mostly used in the world at present. In this method, the standard plate and the measured sample are illuminated respectively at the speed of light under the specified incidence Angle, and the reflected light of the sample and the standard plate is measured according to the specified acceptance conditions on the mirror reflection Angle.   The key of gloss measurement is to specify the measurement conditions. Due to different material properties and gloss levels, it is necessary to select different mirror Angle and light speed incidence conditions and acceptance conditions. It can be seen from the gloss measurement standard that when testing the gloss of different materials, different measurement angles should be selected. In general, low gloss samples are measured at large angles and high gloss samples are measured at small angles.   For universal materials, generally choose 60 degrees universal glossometer.   For high gloss materials, generally choose 20 degrees gloss meter.   Glossometer 60° and 20° application range:   We often do not know how to choose the gloss measurement Angle when using the gloss meter. All light sources reflect off a surface, and the level of the amount of reflected light is called the surface gloss value. Gloss values are measured in gloss units (GU), corresponding to a standard value of approximately 100GU. Gloss can be divided into 3 general ranges: low gloss, half gloss and high gloss. All the angles are calculated from a vertical perspective. Each range is measured at its own Angle. To figure out which Angle to measure from, 60° is a good place to start. If the result is between 10 and 70GU, the coating can be called semi-gloss, measured with this Angle. If the result is less than 10GU, the product is called low gloss and should be measured with 85°; If the result is higher than 70GU, the product is high gloss and is measured with 20°.

In January this year, in the "Optical Journal", published a by the China Jiliang University of Optics and Electronic Science and Technology College and Hangzhou color spectrum Technology Co., LTD., jointly studied "metal paint flash effect evaluation method and device research" paper. This paper describes the researchers developed a measurement device that can evaluate the flash effect of metal paint under various light conditions, and designed visual experiments to verify the degree of match between the measurement results and the human eye evaluation.   In the first step, the experimental setup is set up. When the Angle between the mirror reflected light and the observer is 45°/0°, the flash of the sample is most easily perceived by the observer, and this illumination observation Angle is selected for the experimental setup. The experimental setup was designed in the following structure, with the illumination source and receiver angles fixed at 45° to ensure consistent measurement conditions. The second step is to determine the experimental samples and experimental data. Thirty-nine metal paint color cards were selected from the metal paint color cards made by the automobile paint factory as experimental samples. The color and flash data of all the samples under the D65 light source and 45°/0° illumination observation conditions were measured by BYKmac, as well as the sample image data measured by the experimental device. Through calculation, the correlation coefficient between them is 0.880, which is equal to and slightly better than the existing research results.   In the third step, the visual experiment device is established and the visual experiment data is obtained. Ten observers with normal color vision were selected to obtain data for evaluating the flash condition of the metallic paint samples under D65 and A light sources, respectively. In the fourth step, the experimental data are calculated to obtain the experimental results. The correlation coefficient between the flash level measured by BYKmac and the visual data under D65 light source is 0.878, and the correlation coefficient between the flash data calculated by the experimental device and the visual data under D65 light source is 0.848. The correlation coefficient between the flash level measured by BYKmac and the visual data under light source A is 0.740, and the correlation coefficient between the flash data calculated by the experimental device and the visual data under light source A is 0.851.   Under D65 light source, the matching degree of the data measured by the experimental device and the data measured by BYKmac is close to the matching degree of the data measured by the human eye. Under the A light source, the matching degree between the measured data and the visual data of the experimental device is better than that of BYKmac.   The research paper is introduced here, let's take a look at the three Angle spectrophotometric colorimeter CS-390/392 developed by color spectrum technology for automobile paint, the instrument is specially applied to metal paint, automobile paint and the effect of the surface paint with particles and other industries color detection. The instrument can measure the color data of 15°, 45° and 110° angles. The instrument is small, light and easy to operate. In the automobile paint industry, the instrument can also be combined with the automobile repair formula color measurement software, which can greatly improve the accuracy of color matching and retrieval ability, and improve the efficiency of automobile repair.

The color difference meter is a precision optical measuring instrument that accurately measures the color difference through the principle of light/electricity conversion. Generally, the color data of the measured object is collected from five angles (15°, 45°, 110°), and the measurement results are obtained by analyzing and comparing the collected standard sample data and the sample data.   In the field of optics, color can be measured by the Lab color scalar, the L-axis is the brightness axis, 0 is black, 100 is white; A-axis is red and green axis, positive value is red, negative value is green, 0 is neutral color; The b axis is a yellow and blue axis, positive values are yellow, negative values are blue, and 0 is a neutral color. These scales can be used to represent the color difference between the sample and the standard sample, usually Δa, Δb, ΔL as the identifier, ΔE is defined as the total color difference of the sample, but it cannot represent the deviation direction of the sample color difference, the larger the value of ΔE, the greater the color difference. According to the Lab and Lch principles of CIE chromaticity space, the color difference ΔE, Δa, Δb, ΔL values between the sample and the standard sample can be measured and displayed.   ΔE is usually calculated by the following formula: Δ E * = [(Δ L *) + (Δ a *) + (Δ b *)] 1/2   Sometimes some companies will require a total color difference of less than 2, and some will also require a Lab value. If ΔE≤2.0, it is recommended that Δa, Δb, ΔL are all ≤1.5, and it is generally distinguishable visually when ΔE is 1.5. Since Δa, Δb, ΔL are generally not fixed, in the case of too strict requirements, often on the total color difference ΔE and color difference Δc (without considering the brightness effect) have requirements, at this time can be calculated according to the following formula: ΔE*=[(ΔL*)+(Δa*)+(Δb*)]1/2 Δc*=[(Δa*)+(Δb*)]1/2   The color difference meter is based on the Lab, Lch principle of CIE color space, the measurement shows the color difference △E and △Lab value of the sample and the sample to be measured. The product is widely used in the color detection of paint, ink, textile, clothing, leather, plastic, plastic, printing, coating, metal, etc., then what does the l ab on the color difference meter represent? L: black and white, also said light dark, + means white, - means dark; A: indicates red green, + indicates red, - indicates green; B: indicates yellow and blue, + indicates yellow, - indicates blue;   The above are relative values, simple L,A,B is absolute value, with these three values can be in a three-dimensional map, accurately represent a color point, with the relative value can be obtained and the reference point difference to correct the total color difference ΔΕ= (Δa2+Δb2+Δl2) 1/2.   CIE (International Commission on Lighting) Lab Color Space Brief introduction: L:(Brightness) axis represents black and white, 0 is black and 100 is 100 a:(red green) Positive values are red, negative values are green, and 0 is neutral. b; (yellow blue) axis positive values are yellow, negative values are blue, and 0 is neutral.   All colors can be perceived and measured through the Lab color space, and these data can also be used to represent the color difference between the standard sample and the test sample, and are usually expressed as △Eab (total color difference) △L △a △b.   For example, △L is positive, indicating that the test sample is lighter than the standard sample (white) △L is negative, indicating that the test sample is darker than the standard sample (black).   For example: △a is positive, indicating that the test sample is more red than the standard sample (red) △a is negative, indicating that the test sample is more green than the standard sample (green)   For example: △b is positive, indicating that the test sample is more yellow than the standard sample (yellow) △b is negative, indicating that the test sample is more blue than the standard sample (blue)   △Eab(or △E) is the total color difference, it does not indicate the direction of the color difference shift, the greater the value indicates the greater the color difference.

In the production process, we often find A problem, under this light source to observe the color of A standard sample and B standard sample is the same or the color difference is very small, but under another light source to observe the color of A and B is very different, this phenomenon is called "Metamerism". Heterochromatic spectrum is simply the same color under a light source, but the composition of the spectrum is different. Printing and dyeing industry often said that jumping lights and heterochroma is a concept.      The same two products, under different light sources, the color display is different   The fundamental reason for the different colors of different light sources is that the spectral reflectance of the two colors is different   So in the actual production process how to avoid the occurrence of heterochromatic spectrum phenomenon?   First of all, it is necessary to understand that there are three elements that determine the color of the surface of an object: the object, the light source, and the observer. Only when these three elements are exactly the same, the surface color of the object can be completely consistent. Observers are often the same, and we need to control the consistency of variable elements of objects or light sources to avoid metachromatism.   The first method is to unify the light source. We can use the same environment as the customer's common places and their lighting conditions to carry out color matching work to achieve conditions and other colors. This method has high environmental requirements such as light source, and can not really avoid the phenomenon of metachromatism.   The second method is to unify the spectral reflectance of the object. As long as the spectral reflectance of the color is consistent, then the color of the two objects must also be consistent under any light source conditions.   The color can be seen intuitively, but the spectral reflectance can not be observed with the naked eye, and needs to be identified with the aid of instruments. The spectral color measurement series products developed by color spectrum technology can not only visually read the color value, but also produce spectral reflectance, which greatly reduces the workload of color matching workers, and can help color matching workers improve the accuracy of color matching.

The more advanced spectral type of the color difference meter, that is, we often say that the spectral color difference meter, this instrument contains an optical element that can be used for spectral dispersion.   The spectrophotometer generally uses prisms, grating, interference filters, adjustable or discontinuous series of monochromatic light sources to achieve spectrophotometry, and then analyzes single color information according to the principle of dispersion to achieve color numbers. The spectrophotometer can display chrominance information according to the chrominance space set inside and the calculation formula, and output it in digital form. In addition, the spectrophotometer can also analyze the underlying spectral data information based on the colorimetric data.   We know that ultraviolet light is not in the visible spectrum and cannot be captured and observed by the naked eye, but it can affect the change of color. There is an ultraviolet resolution spectrophotometer used to measure chroma, which allows for more accurate color analysis.   However, now more manufacturers like to use color measuring components to complete this measurement, the component can help measure more product color information, while the accuracy can be guaranteed, but the component is easier to adjust the internal technology of the light color difference meter, but also reduces the manufacturing cost of the instrument, so that more manufacturers can afford to use.   Spectrophotometer is designed for visual colorimetric data comparison and simulation, and is an important auxiliary tool for computer color matching, which can help major manufacturers to complete the analysis, processing and monitoring of spectral and colorimetric information. In the use of luminous color difference meter, it will involve a key data equation - color tolerance equation, which is actually the tolerance range we usually say, in industrial batch generation, there is a tolerance to control the product and qualified situation, both fast and reasonable.   To measure the color difference between products and control the ordinary color difference meter is the same, we must first measure the information of the standard sample product, and then measure the color information of the sample, and obtain the color difference data by comparison. In fact, color measurement and color management are the same overall, but the spectrophotometer is more accurate and more comprehensive.

Color difference meter has a wide range of applications in the surface color industry such as coating, building materials, paint, coatings, textile printing and dyeing, ink, plastics, dye pigment manufacturing, etc., also known as CIELAB uniform color space. Let's analyze the Lab values according to the color difference measurement interface:   ColorMeter Pro is a different color tool, powerful performance configuration, make color measurement more professional; The instrument can be wirelessly connected to Android or IOS devices, which greatly expands the application field of color measurement. It will take you into the new world of color management, can replace printing, paint, textile and other color cards, to achieve color reading, color card search functions.   Color difference meter lab value meaning: L: (Brightness) axis represents black and white, 0 is black, 100 is white. a: (red green) Positive values are red, negative values are green, and 0 is neutral. b: (yellow blue) Positive values are yellow, negative values are blue, and 0 is neutral.   All colors can be perceived and measured through the Lab color space, and these data can also be used to represent the color difference between the standard sample and the test sample, and are usually expressed as dE*ab (total color difference) dL*, da*, db*.   When dE is between 0-1, the color difference is not discernible to the naked eye If the dE is between 1-2, the human eye is slightly aware, if the chromatic sensitivity is not high, it is still not visible. If the dE is between 2-3, the color difference between the substances can be slightly clearly identified, but it is relatively not obvious. Once dE reaches between 3.5-5, the color difference is very obvious So dE above 5 looks like two colors.   Such as color difference treasure data: dL* is 22.6 positive, indicating that the test sample is lighter (whiter) than the standard sample, and the interface will directly display how white and less black; If dL* is negative, the test sample is darker (darker) than the standard sample. da* is 47.7 positive, indicating that the test sample is more red than the standard sample (reddish), and the interface will directly display more red and less green; Conversely, if da* is negative, the test sample is greener than the standard sample (greenish). Db* is 43.4 positive, indicating that the test sample is more yellow than the standard sample (yellowish), the interface will directly display more yellow and less blue; Conversely, if db* is negative, the test sample is bluer than the standard sample (bluer). dE*ab(or dE) is the total color difference, it does not indicate the direction of the color difference shift, the greater the value indicates the greater the color difference.   Color difference formula: dE=[(dL)2+(da)2+(db)2]1/2. dL=L Tested product -L standard sample (brightness/black and white difference) da=a Tested product -a standard sample (red/green difference) db=b Tested product -b standard sample (yellow/blue difference) △L+ means white, △L- means black △a+ is red, △a- is green △b+ indicates yellow, △b- indicates blue   Overall, the color difference meter is a convenient operation, intuitive data detection of color difference equipment, currently in the daily production and life process is very widely used, so the need for color management friends can carefully study the meaning of the above Lab value.

SCI refers to the inclusion of specular reflected light mode, generally used for those who study the properties of the color itself without concern for the color attached to the surface gloss of the sample manufacturers, such as paint coating factories. SCE refers to the method that does not contain specular reflected light, which is generally suitable for those samples that are directly observed and require measurement results to be very close to the visual view, such as home appliance housings.   In the SCE measurement mode, specular reflected light is excluded and only diffuse light is measured. The value thus measured is comparable to the color of the object as it appears to the observer. When SCI mode is used, specular reflected light is included in the measurement along with diffuse light. The value measured in this way is the overall objective color of the object, and has nothing to do with the surface conditions of the object. These criteria must be taken into account when we choose an instrument. Some instruments can also measure values in both SCE and SCI modes.   SCI and SCE options generally only appear in the Settings of color measuring instruments of the d/8 structure.                                     Even if the object is made of the same material, the color will look different due to the difference in surface gloss.   Because light from a light source produces light that is reflected back from the same Angle in different directions, we call it specular reflected light, because the light is like being reflected back by a mirror. Light that is not reflected by specular reflection but scattered in all directions is called diffuse light. The sum of specular and diffuse light is what we call reflected light.   On smooth, bright surfaces, specular light is stronger and diffuse light is weaker. On rough surfaces with low gloss, the opposite is true. When people observe the color of the object, they ignore the specular reflected light. When measuring such samples, in order to make the data look the same as the object, they must exclude the specular reflected light and only measure the diffuse light. The color of an object is different because of the amount of light reflected by the mirror we observe.