Dyeing production, color is a very important link, so we often encounter some problems, today to introduce, dye in different light why the color change lamp? Simple introduction of dye in different light color change jump light theory knowledge, for reference.

01

Noun relating to color change

First, we'll introduce the triplet value, which is related to color change.

1. Tristimulus Values

When light hits the surface of an object, color appears because part of the projected light is absorbed by the object and part is reflected. The eye is from the visible spectrum from 400μm wavelength to 750μm wavelength, human use this reflected wavelength to feel different intensity, in the human visual system structure, there are three different stimulus centers, can resolve this wavelength intensity to feel red, green, blue and other three exciting quantity and then sent to the brain of the thorn to form a color; These three stimuli are called Tristimulus Values.

2, color change Metamerism(jump light)

What CALLS COLOR CHANGE (JUMP LAMP) : TWO COLORS "STANDARD SAMPLE" AND "COMPARE SAMPLE", ALTHOUGH CAN BE IN SPECIFIC LIGHT SOURCE TO COLOR IS CONSISTENT, BUT BECOME INCONSISTENT BELOW ADDITIONAL LIGHT SOURCE, THIS CALLS COLOR CHANGE. These two colors are called "color alignment."

The REASON FOR ITS OCCURRENCE: IT is explained IN PHYSICS THAT there is a pair of colors, their spectrum is different but the same under some light source, THIS pair of colors is called "same color difference", of course, for other light sources are not the same immediately. Further explanation, under a particular light source (we call it DIYI light source), the triplet values of the standard sample and the comparison sample are adjusted to the same, so they look the same. But under another light source (we call it the second light source), the triplet values of the standard sample and the comparison sample are not necessarily the same, and the reason for this is that the second light source, The intensity of each wavelength of the spectrum from 400μm to 750μm is not consistent with the original DIYI light source, so the intensity of the light reflected on the color sample will be different, and the intensity will be different, and the triad value will be different, and the combination of the brain will not feel the same color as the DIYI light source.

02

Why do different types of dyes turn worse?

1, dye (color) material structure Dye structure is basically divided into three parts: "color root group", "reaction (combination) root group", "connecting root group".

Chromophore: THIS CHEMICAL STRUCTURE CAN BE ILLUMINATED WITH LIGHT (PHOTONS) (PHOTONS STRIKE THE CHROMOPHORE, PRODUCING RESONANCE AND EMITTING A SPECIFIC WAVELENGTH) TO GIVE A SENSE OF COLOR.

Reactive (binding) root mass: THE reactive root mass that can bind to the fiber and fix the dye is called the reactive root mass of the dye. The reactive binding root mass is not the same for different fibers. For example, cotton, or nylon/nylon dyes have their own reactive root groups.

Connecting THE root mass: between the chromic root mass and the reactive root mass, to bridge the chromic root mass and the reactive root mass, so that the chromic root mass and the reactive root mass become one.

03

Why does the same kind of dye produce less color jump light (color change)?

And non-homogeneous dyes produce larger colors.

1. Numerous products have been developed for any type of dye, but the products are not suitable for the commercial market. If global dye companies suitable for commercialization compete to copy, some will only slightly change the chemical structure of the dye in order to avoid patents, so the wavelength spectrum of the dye is very close.

2. Now the technical differences of printing and dyeing factories are small. Many dyes used are open secrets, and the dyes used are almost the same. For example, the customer gives the standard color sample for cotton dyeing, and the customer gives the standard color sample for nylon dyeing. Therefore, the use of the same type of dye changes the color very small.

The more different the category, the larger the color. At present, the computer color matching is certainly effective for the color change of three colors (jump lights). The dye you have calculated at present (that is, the dye in use in the factory) will find the combination of color change value Zuidi. (But may not be able to completely eliminate color change, color change value or large or small, unless it is a coincidence).