light resistance test

Take sheets of various color samples and irradiate them in Fade-O-Meter for 3-4 hours. The results are compared with the Blue Scale 1-8 levels to determine the quality of light fastness. Level 8 is the best (no discoloration), and Level 1 is the worst (severe discoloration).

Heat resistance test

Take sheets of various colors and place them in an oven. Take one piece every 10 minutes at 180 ° C2C until 8 pieces are taken. Conduct an aging test and observe the degree of discoloration (fading). Level 5 best (no discoloration), Level 1 worst (severe discoloration)

Migration test

Take sheets of various colors, with two white sheets sandwiched on both sides. Place them on top and bottom with flat glass clips and place them in an oven. Press a 3KG heavy hammer for 100Cx8 hours before removing them. Observe the degree of contamination of the white sheets by migration, with Level 5 being the best (not contaminated) and Level 1 being the worst (severely contaminated by migration).

Migration resistance test

Take 2g of each color sample and dissolve it in 100g of PVC paste. Use a scraper to coat it on release paper and bake in a 150 ° C oven for 10 minutes. After baking, remove it from the release paper and observe the degree of contamination on the release paper. Level 5 is the best (not contaminated), and Level 1 is the worst (severely polluted).

Sulfur resistance test

Take sheets of various colors and place them on the mouth of an H2S generating dish. Cover the test piece with a flat glass sheet, press it down for 15 minutes, and then remove it. Observe the degree of contamination, with Level 5 being the best (not contaminated) and Level 1 being the worst (severely contaminated).

Preparation of H? S: 10ml of 6N HCI is added to a triangular conical flask and 1g of FeS is added to produce H? S gas.