First of all, the fading of the picture is related to the pigments in the ink, the light resistance of pigments is divided into 1-8 grades, of which 8 grades are the highest, and the pigments in Chenbang ink choose 7-8 grades of light resistance, so they have very good light resistance and weather resistance. 

First of all, weather resistance has an important relationship with ink, and there are other major influencing factors: 

1. 

When the inkjet substrate uses the same ink in the same area, the greatest impact on the weather resistance is the choice of the substrate. 

Because the amount of ink absorption of different substrates is different and the surface alkali resistance is different, it affects the retention time of ink on the material. 

two。. 

Whether there is a coating on the surface of the substrate, the substrate with a coating on the surface is adsorbed in the coating because the ink is adsorbed in the coating, and the coating has anti-ultraviolet, acid and alkali resistance, so the weather resistance is greatly improved. 

3. 

UV exposure time is different because the billboard has different directions, so the UV exposure time is different. 

In this way, the weather resistance of the billboards made at the same time is also very different. 

4. 

Rainfall and Rain Water acidity and alkalinity. 

What are the factors that affect the weather resistance of the picture? 

Outdoor light resistance and weather resistance are important indicators to measure the application of ink. 

Due to the action of sunlight and atmosphere, the organic pigments in the ink undergo chemical reactions and change the color, resulting in the fading of the picture, the light resistance of the pigment adopts the rating standard, the better the chemical stability of the pigment is, the higher the grade is. Grade 8 is the highest, and in the actual inkjet printing outdoor performance, there are several factors that seriously affect the outdoor weather resistance of the picture: 

1, printing mode: inkjet printer different printing modes, the amount of ink per unit area is different, resulting in a difference in color concentration, so high pass printing, the higher the picture accuracy, the higher the color concentration, the better the light resistance, on the contrary, low pass high-speed printing, the lower the picture accuracy, the lower the color concentration, the worse the light resistance. 

2. The directionality of the picture suspension: the light resistance of the sample is usually measured by the time the sample is exposed to simulated solar feet in the test box. 

Therefore, the advertising picture hanging in different directions, the time of receiving sunlight is also different, resulting in differences in weather resistance. 

3. The environment in which the picture is suspended: the weak acid and weak alkaline Rain Water formed by external air pollution will accelerate the change of pigment chemical composition and reduce the weather resistance of the picture. 

While selecting 7-8 grade sun-resistant pigments, Chenbang products take advantage of advanced technology to passivate the surface of pigment particles to improve their light resistance and weather resistance.