FYI Tester Instrument

Colorfastness refers to the ability of a material or substance to retain its color when exposed to various environmental factors such as light, heat, water, and other chemicals. It is a measure of a material’s resistance to color fading, bleeding, or transfer to other materials. Different types of color fastness tests can be performed depending on the specific requirements of the material or product, including tests for light fastness, washing fastness, cracking fastness, and perspiration fastness. Understanding color fastness is important to ensure the longevity and durability of materials and to prevent color transfer or fading. Terms and Definitions Colorfastness: The resistance of color against outer influences is called colorfastness. It is distinguished between production colorfastness and usage colorfastness. Change of color: During colorfastness tests, the change of the color within the visible spectrum between treated and untreated sample is measured. The color change can be c

Hot melt coating involves heating and melting organic compounds such as asphalt, paraffin, polyethylene, polypropylene, polyethylene terephthalate, and polyacrylic acid resins into a liquid, and then coating the substrate. The coating is carried out in an adiabatic state, and the finishing is measured with blade. The coated paper web is cooled by a cooler or a cold cylinder; The molten coating is formed on the substrate to form coating. And the coating is rolled and processed into finished products. Working principle First, heat the hot melt adhesive box and guide the paper or other substrate in the direction shown in Fig.1. When the hot melt adhesive box is heated to the set melting point temperature of the hot melt adhesive, the hot melt adhesive is melted. The melted adhesive is pressed into the coating die by the hydraulic system; The coating die is placed against the substrate, and the hot melt adhesive is sprayed onto it. At the same time, start the transmission motor to press th