Oxidizing inks, oil-modified resins, pigments, fillers, driers, inks, storage of ambient temperature, humidity, etc. The ink on the crust has an effect on the use of anti-skinning agents, you must consider the above factors, add The following seven basic knowledge, but also should pay attention to the question: how to effectively prevent the ink shell? Alkali resistance of pigments: Pigments are materials that impart color characteristics to the ink and meet the color requirements of printing. Since the resin of the aqueous ink is mostly alkali-soluble, the viscosity and pH of the ink are precisely controlled, and the pH is generally controlled between 8.0 and 9.5. When the pH is higher than 9.5, the alkalinity is too strong, the viscosity of the ink will decrease, the monotonic speed will be slow, and the water resistance will be deteriorated; when the pH is lower than 8.0, the alkalinity will be too weak, and the viscosity of the ink will rise. The ink is easy to monotonous and will form defects such as dirty plate, paste and blistering. Therefore, pigments with excellent alkali resistance must be used when selecting pigments. Relative density of pigments: When the relative densities of pigments for aqueous inks are very different from each other, pigments with relatively low density are simply floating on them. For example, ink-green inks are often co-colored with pigments such as carbon black and phthalocyanine blue lead chrome. The phenomenon of floating color, hair flowering, sedimentation, etc.; when the relative density of the pigment is too large, the stability of the aqueous ink is damaged due to its simple deposition and agglomeration, such as iron red, chrome yellow, etc., often because the agglomeration cannot be stirred. The pH of the aqueous ink is directly related to the viscosity of the aqueous ink, printability such as dryness. Experiments show that the viscosity of aqueous ink increases linearly with the decrease of pH value, and its drying property decreases linearly with the increase of PH value. The pH value of the water-based ink is mainly maintained by the amine compound, and the evaporation of the amine substance in the printing process causes the pH value to decrease, thereby causing the viscosity of the ink to rise, the transferability is poor, the drying is accelerated, the anilox roll is clogged, and the paste is broken. Article source address: http:// Electronic Lifting Desk Series Electronic Lifting Desk Parts,Adjustable Standing Desk,Height Adjustable Desk Bulk,Height Adjustable Standing Desk SHENZHEN CHANGJIANG FURNITURE CO., LTD , https://www.findcjf.com