Sunlight climate color fastness tester FAQ analysis

The tanning climate color fastness tester adopts oil-free air compressor and a number of automatic control, safe and reliable operation; the light source of the color fastness tester adopts SZl500 type xenon arc lamp, as a radiation source radiating visible light range (380nm ~ 750nm) and ultraviolet range (300nm ~ 380nm) two aspects extremely similar to daylight. Such a radiation source is equivalent to the results of daylight measurements.

 

The testing principle of this product is to provide the simulated natural conditions required for testing by controlling the quantitative indicators of light intensity, temperature, humidity and rainfall in the test chamber to detect the light resistance, weather fastness and light aging performance of the specimen. The instrument has online control of light intensity, automatic monitoring of light energy and automatic compensation; temperature, humidity closed-loop control, blackboard temperature loop control and other multi-point adjustment functions;

Sunlight climate color fastness tester will be used for a long time there will be a variety of problems, the following are a few common problems on the analysis of this product, I hope to help you.

 

A: on the rubbing color fastness problem

 

Factors affecting the color fastness of reactive dyes to wet rubbing:

 

1. The structure and characteristics of the reactive dyestuff itself

 

2. The nature of cellulose fabrics

 

3. Pre-treatment effect, fabric breakage and surface finish

 

4. Dyeing process and the effect of soaping after dyeing

 

5. The effect of color fixing treatment after dyeing

 

6. The effect of dyeing fabric finishing and the effect of cellulose fiber degradation

 

How to effectively improve the color fastness of fabric dyeing to wet rubbing?

 

Appropriate pretreatment of cellulose fiber before dyeing, such as mercerization, burnishing, cellulose enzyme brightening treatment, desizing and cooking, bleaching, washing and drying, can improve the surface finish and gross effect of fabric, reduce friction resistance and floating color.

 

Second: water resistance, washability and fastness to sweat stains

 

The main reason: the textile products used in the processing of additives at high temperatures on the dissolution of dyestuff and dyestuff molecular structure and textile products used in the processing of additives (of which non-ionic surfactants are also important factors)

 

Three: spandex-containing elastic fabric color fastness problem

 

The main reason: spandex containing elastic fabric color fastness problem is mainly due to the surface of the fabric

 

The cotton, polyester and nylon fiber itself color fastness problems caused by.

 

Four: paint printing fabric color fastness problems

 

Main reasons.

 

1. The role of printing binder is divided into three categories: hard monomer, soft monomer and functional monomer.

 

2. Hard monomer plus more, in favor of improving the printing of friction fastness, will make the printing parts feel hard, easy to crack, light stability decline, easy to yellowing.

 

3. Soft monomer added more, can improve the feel and light resistance, but the film strength is too low, so that the rubbing color fastness decreased.

 

4. Polyacrylic acid is easy to swell under wet condition, so that the film strength decreases, and the color fastness to wet rubbing decreases.

 

Therefore, soft and hard monomers should have an appropriate ratio according to the design of the product and the actual conditions of use.

 

Five: denim fabric ozone fastness problem

 

1. The root cause of poor ozone fastness of indigo denim fabric.

 

Indigo will decompose into indigo under the action of strong oxidizing agents, and ozone has a strong oxidizing effect.

 

2. Indigo should be red, but the actual test saw the phenomenon of more yellow, which is related to the purity of the dye used, dyeing process added by other chemicals, fabric and finishing process.

 

Well, the above is the analysis of the relevant content of the sun and climate color fastness tester, I hope to bring you some help.