by staff » Mon Jan 29, 2018 11:03 pm
Hello, this is not appropriate because the color used to make cosmetics must be Pigment Grade, which means the color of the raw materials in each lot must be constant or very close. The Lab Delta E standard is usually used to compare the color values and the colors in each lot, although they are not 100% identical, but the Delta E values do not exceed -1 to 1. The values in this range are Humans cannot see the difference with the naked eye. Controlling this color There are only raw materials that are Pigment Grade.
Staff - MySkinRecipes