Bamboo Outdoor Fencing,Bamboo Wall Panels Outdoor,Outdoor Bamboo Wall,Bamboo Panels Outdoor ZHEJIANG JIAHE BAMBOO TECHNOLOGY CO., LTD , https://www.zhuart-bamboo.com
Solvents: Generally referred to as high-boiling mixed solvent, it is not only a good solvent, but also a good wetting agent for the pigment (caused by volatilization of the solvent, the solubility of the ink (film-forming) body becomes poor, resulting in shrinkage, or Bake marks, blisters and other defects occur in baked iron offset inks.
Resins: Acetylcellulose is generally used, especially polyacrylate-resistant shrink-resin resins with limited compatibility. The dosage is: 1% to 1.5% of acrylic resin, 0.5% to 1% of epoxy resin, and 1% of polyester resin.
Silicone resins have the function of anti-shrinkage, leveling, anti-floating, and defoaming. For example, domestic XH204 water-based silicone oil helps to promote the flow, leveling, and brightening of printing inks in water-soluble acrylic inks.
In addition to the above-mentioned anti-crater agents, there are silicone-free fluorine-based surfactants that are high molecular surfactants, which prevent shrinkage of the ink film, promote leveling, and improve the luster of the ink (printing). The degree is also very effective.
The prevention of the shrinkage of the ink film of the packaging printing ink is an important measure to improve the effect of the ink on the decoration of the packaging printing and decoration. The purpose of using different anti-shrinkage holes and leveling agents is to improve the printing quality and to extend the printing (surface ink film) grade.
Although their types are numerous, their uses are limited. Sometimes even improper use or improper use, not only difficult to achieve the desired effect, and sometimes will bring side effects.
Years of practice have proved that before use, different varieties and quantities should be screened and tested strictly to find the best variety and the most suitable amount. In addition, it is also necessary to select more scientific process flow through batch comparison tests, and even include adding application methods during the printing process. Only in this way can we continuously improve the product quality of packaging and printing products in China so as to accumulate more theoretical knowledge in practice.
Remedies for Printing Film Shrinkage
In order to correctly select the anti-crater agent for printing ink, the following describes various types of anti-crater agents.