Textile industry used the top 3 major color-coded light requirements

In the textile industry, What are the top 3 major color-coded light requirements? In order to ensure the consistency of the color of the sample and the color required by the customer, it is necessary to carry out color matching under the specified light source, for the color matching light source, the customer order or contract generally has precise requirements of the color matching light source. So, what are the common types of light sources for color matching in the textile industry? And what are the requirements?

The textile industry commonly uses the top 3 major color-code light requirements

top 3 major color-coded light requirements
  1. Color temperature requirements

The color temperature of the standard light source used for color should reach the specified color temperature, plus or minus cannot be higher than 500K, and in some strict enterprises, the color temperature of the standard light source used for color paradigm must be plus or minus 200k. For example, in the use of a D65 light source, the color temperature needs to be guaranteed in the 6300-6700K paradigm domestic. If the color temperature does not meet the requirements, it can not be used as a color light source.

Here the concept of color temperature refers to the light source containing the color component, color temperature is low light source color yellow, and color temperature is high blue.

  1. Color rendering requirements

Color rendering refers to the ability of the light source to restore the color of the object, the color rendering of different light sources is very different, and color rendering does not have enough light source environment, which will make our color measurement results produce great deviation. Usually, the standard light source for color requires a color rendering index of 90 or more. For some commercial lighting sources, the color rendering index will be relatively low.

The color rendering index is used to measure the color that can be seen under a certain light source and the color that can be seen under natural light irradiation, that is, Ra = the color that can be seen under a certain light source ÷ the color that can be seen under natural light irradiation, Ra is closer to 100%, indicating that under the light source, the color that is revealed and the difference between the color that is revealed under natural light irradiation is smaller.

  1. Illumination requirements

We know that there is no light, or light is very dark, but we also have difficulty observing the color of the object. Here the light, the dark feeling can be used to indicate the illumination of the light source. If the illumination of the light source is not up to standard, then the detection of color will be distorted.

According to the requirements of ISO3664:2000.
(1) The luminance of the light source irradiated by reflection on the surface of the observed object shall be 2000LUx (+/-500LuX). The illumination of the illuminated surface in the range of 1mx1m, the illumination of any point shall not be less than 75% of the illumination of the center of the illuminated surface.
(2) The luminance of the light source through the transmission irradiation on the surface of the observed object should reach 1270cd/m2 (+/-320cd/m2)
(3) The luminance of the pincushion should reach >75cd/m2.

What are the color-code requirements for the textile industry?

Customer orders or contracts usually have clear requirements on color-matching light sources, such as natural light, fluorescent light, office building light, D65, TL84, CWF, F/A, UV, etc. Therefore, color matching should be done under the light sources requested by customers; if there is no clear requirement, color matching should be done under the scattered light from the north window.

  • Standard lightbox

Standard lightbox and the lamp used, the brand is more. Different brands of light boxes and lamps, the color of the color light there are certain differences.

Improper use of the standard light box, such as the gray base of the light box placed on the color card sample card, or even in the lightbox on the inside wall of the cross-color prescription paper and color sample plate, which will cause a certain impact on the color of the color light, so that the use of the factory light box color light matches the color light and the use of the customer company’s lightbox color deviation phenomenon, resulting in small samples and large samples of color light recognition difficulties.

Therefore, the standard light box, especially the lamp, must be used to meet the international standard products, and the correct use of the lamp, in order to eliminate the lamp light source is not a standard improper use of the lightbox and lead to color differences.

D65 light source is an artificial daylight light source, compared with the natural light sources, they do not exactly have the same response to the dye color light.

Some customers confuse the two and think that D65 light is natural light, so it often generates the sample color list specified as D65 color, but the acceptance of small samples (or large samples) are a natural light color, the factory and customers naturally have differences. In this regard, we must communicate with customers’ Household communication, unified understanding, to eliminate misunderstandings.

  • Color light jumping light property

Some customers require the use of two different light sources to color, or even require two light sources at the same time on, with a mixed light source to color. In this case, usually will produce the obvious light jumping problem.

The phenomenon of light jumping in color imitation is also known as light discoloration, that is, the color sample in different light sources shows different colors, and sometimes even the face is completely different. Chromaticity is called an isochromatic phenomenon or conditional isochromatic.

Observed under different light sources, sometimes the color light varies greatly. Natural light, fluorescent light, D65, CWF, TL84, and other light sources can produce the phenomenon of isochromatic heterogeneity, sometimes very serious.

For example, the Tibetan Mon color differs greatly under natural light and fluorescent light. Therefore, color matching must be done under the light source specified by the customer.

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