Formaldehyde resin, relative density 1.14 ～ 1.19. The melting point is 88~108 ℃. The glass transition temperature is t50 ～ 75 ℃. Soluble in ethanol, isopropanol, toluene, ethyl acetate, acetone, butanone, cyclohexanone, chloroform, etc., slightly soluble in cyclohexane, insoluble in petroleum ether and water. It has strong adhesion, high luster, high hardness, excellent weather resistance and chemical resistance. It has good compatibility with epoxy resin, phenolic resin, amino resin, chlorinated polypropylene, polyamide, chlorinated rubber, rosin resin, petroleum resin, etc. non-toxic.
Our company mainly produces polyketone resin, aldehyde resin, water-based UV resin, welcome customers to order online. Ink management is mainly to control the color quality parameters of ink through the detection of its hue, tinting power and light resistance, and eliminate color deviation from the source. The quality of printing ink directly affects the correctness and stability of the color of printed products.
The water-based ink used in flexographic printing has the characteristics of low viscosity and low pollution. Ink management is mainly to control the color quality parameters of ink through the detection of its hue, tinting power and light resistance, and eliminate color deviation from the source. The ink testing and relevant data can be provided by the supplier or tested by the printing enterprise itself. Hue and tinting power are the basic items of ink detection, which have a great impact on the color of ink.
Hue is the specific feature of ink color. Optically, it corresponds to light of a certain wavelength and frequency, such as red, yellow and blue. Coloring power refers to the degree to which one ink affects the color change of another ink. When the spot color ink is deployed, when the hue or color of one of the original inks changes, the color of the spot color ink transferred will change. For example, when the hue of the original ink is yellow, the spot color ink will have the effect of increasing yellow; If the coloring power of the red original ink is strong, it will have the effect of increasing red. When the color deviation exceeds a certain range, it can be found by visual inspection, thus leading to customer complaints. Therefore, it is very important to control the color of printed matter to ensure the correctness of the color phase of printing ink and the stability of the coloring force.