Toning method in dyeing process!

First, preparation before color conditioning.
 
1.1 physiological preparation
 
When people are resting well and energetic, the accuracy of palette adjustment is much higher than that under fatigue; when they observe a color, the accuracy of first eye measurement is higher than that of repeated visual measurement for a long time. Therefore, in a good mental state, focusing on visual results in a short period of time is the physiological prerequisite for efficient color matching.
 
1.2  dye selection
 
According to customers' samples, we first need to know the color requirements of customers. If customers require multi-source color matching, they need to use computer color measurement to select dyes, in order to avoid or reduce the homochromatic heterographic phenomenon between the typed sample and the customer sample (hereinafter referred to as the customer sample).
 
To understand the fastness properties of the selected dyes and the fastness requirements of customers, and to understand the operability, stability and safety of the selected dyes. Finally, we should also consider minimizing costs and reducing emissions.
 

 
Two. Color matching of three primary colors
 
Color matching is the most common method. And more samples can be dyed with three primary colors. If the properties of the three primary colors used in the sample are similar or consistent with the dyes used in the sample, the homochromic spectrum will be very small or no homochromic spectrum phenomenon.
 
Generally, dyestuff manufacturers recommend three primary color combinations with different dyeing depths according to the indices of dyestuff's directness, migration, diffusivity, promotion and reactivity. For example, Clariant acid dyes have light three primary colors: Yellow E2RL or E4RL, Red EBNL, Blue EBGL; Middle three primary colors: YellowN3Rl, Red N2RBL, Blue NBLN; Middle dark economic three primary colors: Yellow N3RL, Rubine N5BL, Blue NRL or NRBL.
 
There are two ways to get the first prescription after choosing a dye: one is to use computer and software to automatically find the closest first prescription from the database previously entered into the computer; the other is to calculate the first prescription according to the color data of different concentration of each single dye (also known as monochrome data) entered into the computer. A prescription.
 
Second, according to the historical sample cards retained. Many experienced color palmists usually accumulate many historical sample cards. When the samples come, they can look for the closest historical sample cards and get the first prescription after revision. The following three methods of continuous pad dyeing are used to explain the three primary colors.
 

 
2.1  first depth, then hue.
 
The human eye is most sensitive to the hue of the three elements of color, followed by purity and lightness of lightness. The colour of the same dye changes at different concentrations, especially in darker colours, such as Clariant Navy NRBL. The darker the blue, the redder the colour. Moreover, the dyestuff saturates after dyeing at a certain depth, and the amount of dyestuff will not increase even if the amount of dyestuff is increased.
 
In this way, if the color matching is consistent and the depth is different, when the proportion of the dyes increases or decreases, the color change is often caused. Therefore, if we first adjust the depth on the basis of ensuring the color similarity, and then adjust the color, so that the dyes used in the later adjustment increase or decrease very little, the human eye can not feel the change of the depth, but the change of the color is clearly reflected.
 
Generally speaking, when the single depth of big red increases, the color light becomes yellow; when the single depth of jujube red increases, the color light becomes blue-black; when the single depth of sapphire blue increases, the color light becomes red; when the single depth of black increases, the color light becomes red-yellow; and when the single depth of coffee increases, the color light becomes blue. We have mastered the law of color light changing with depth, and can also harmonize the depth and color phase, so that the color matching efficiency can be higher.
 
2.2  percentage addition and subtraction algorithm
 
Percentage addition and subtraction is the basic algorithm in color matching. For example, when the mass concentration of a dye is 1 g/L, the visual or computer color measurement thinks that it should be increased to 1.1 g/L, and the algorithm should be increased by 10%.
 
2.3  exchange method.
 
The replacement method is mostly used when the color adjustment is larger. For example, a 0.5 g/L dye is used for proofing, and it is considered to increase to 1 g/L after the guest sample.That is to say, 100% increase. In turn, we can use the customer sample to check whether we want to subtract 50% from the 1 g/L of the customer's opinion to the color of the sample. This enables the accuracy of color matching to be verified and corrected.
 

 
2.4 attack method
 
The attack method is to find the location of the guest samples from many samples. For example, the dye dosage of the sample A has been 0.8 g/L, and the dye dosage of the sample B is 1.1 g/L. A sample is found to be shallow and B sample is deep. When the sample is placed between A and B, the distance between the color depth of A sample and B sample is twice as long as that of B sample, so the amount of dye used is about 1 g/L.
 
2.5  cross step method.
 
The cross step method is to deduce the location of the guest sample from the multiple samples that have been beaten. For example, the amount of dye used in sample A is 0.7 g/L, and that of sample B is 0.9 g/L. The amount of dye used in sample A and sample B is not enough. Visual measurement is from sample B to customer.
The dosage of sample should be increased by half of that of sample A to sample B. At this time, the dosage of dye is 0.9 g/L+ (0.9-0.7)/2 g/L=1 g/L.
 
2.6  absolute law.
 
Absolute method is based on full understanding and clear memory of monochrome data. It is mostly used when a new dye is needed in color matching. This dye has not been used before in color matching, and of course, it can not be used in percentage addition and subtraction.
 
If the proportion of new dyes to the main dyes is relatively large, the computer color measurement should be used to select the dyes in order to prevent homochromic spectrum. For example, the sample is different from the sample in red light. Visual measurement of the color depth of a red dye at 0.1 g/L can fill the gap between the sample and the sample, that is, adding 0.1 g/L of the red dye to the color matching prescription.
 
2.7  relative method.
 
Relative method is mostly used to add a new dye in color matching. The premise is to have a full memory and understanding of the color, light, strength and lifting power of each dye. For example, dye A (force 200%) 10 g/L, dye B dosage 1 g/L (force 100%) is the main dye A, dye C (force 100%) is added between visual sample and customer sample, and dye C dosage is considered to be 2% of the main dye A under standard force.At this time, the dosage of dye C in the prescription is 10 g/L×, 2%×, (100%/200%) =0.1 g/L.
 
This method is generally used in conjunction with absolute method to improve the accuracy of color matching prescription.
 
2.8 computer color matching
 
When the dyeing process conditions are fixed and controllable, and the input data system is correct, computer color matching has higher accuracy and stability. But in practice, especially in workshop production, the effect of computer will be greatly affected by various uncontrollable factors. Therefore, on the one hand, we must constantly strengthen and improve the controllability of production conditions, on the other hand, we must strive to reduce the randomness of human operation, in order to truly play the role of computer color matching.
 
Three, non three primary color matching
 
Restricted by certain dye selection conditions, such as to improve the stability of bulk production; or a dye color has been close to the sample, only a small amount of other dyes can be added to adjust the sample color; or customers have high requirements for homochromic spectrum and can not use three primary colors, then non-three primary colors will be selected or some non-three primary colors will be selected. Three primary colors match colors. Such as scarlet + orange + green, Yellow + Green + ash, dark brown + yellow brown + black.
 
According to the principle of subtraction, the color light of non-tri-primary dyes can be understood as a combination of several tri-primary dyes. In practice, the color light of non-tri-primary dyes can generally be composed of several tri-primary dyes. For example, large red can be composed of about 20% of tri-primary yellow and 80% of tri-primary red.
 
Because each dyestuff manufacturer produces different dyestuff shades, strength and lifting power, it can be used in practice to color a non-tri-primary dyestuff shade with a sample of tri-primary dyestuff, in order to grasp the proportion content of each tri-primary shade contained in the non-tri-primary dyestuff shade, and lay the foundation for the efficient color matching of non-tri-primary dyestuff. After the color and light components of the non-tri-primary dyes are analyzed clearly, the tri-primary coloring method can be used for color matching.