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)