(secondary) drying speed
The drying speed of ink and ink affects the printing speed. In particular, high-speed printing requires the drying speed of the ink. For example, in the case of pattern superimposition, due to the difference in the drying speed of the ink, the color shift of the printing color and the superposition of the printing may be inferior. The rapid drying of the ink will cause a layer of film on the surface of the printing plate, which will affect the transfer of the ink and ink, resulting in the formation of ink deposits and agglomerations in the small-size printing plate to make the printing fuzzy, and it will also make the ink not easily preserved and easily solidified. Deterioration. Therefore, the ink drying performance should be given an assessment index. It allows the user to adjust the drying speed of the ink according to the product or substrate, ensuring the ink drying is good while taking into account the suitability of the viscosity and the stability of the PH value.
(Secondary) wear resistance
The abrasion resistance of ink is related to the quality of the resin material used. The level of abrasion resistance directly affects the dry-friction resistance of printed products during handling. After corrugated cartons are printed and printed, they must be repeatedly subjected to the friction of carrying, reloading, and loading and unloading to finally reach the consumers. Therefore, the abrasion resistance of ink blots is an important assessment index for ink painting.
(secondary) anti-rotation performance
Light-resistance performance: Paper-based packaging prints are transported, stored, and displayed many times after being produced by a production company until they finally reach the consumers. Products printed with inks that are poorly light-resistant are in compliance with the requirements of the paper-based packaging manufacturing company, but color deviations or discoloration may occur after circulation. As a result, there will be controversies between the supply and demand sides. This is also a piece of information that should not be overlooked when the standards are formulated.
(secondary) solids
Solid content refers to the proportion of solid content of water, resin, pigment, and other additives in the water. The solid content of the ink and ink has an effect on the economic indicators and quality indicators of the ink. Solid ink content should be ≥ 45 ± 5%.
(Secondary) fineness
Fineness refers to the size of the toner particles in the ink. It is an important quality indicator. The fineness of the ink should be 10 to 20 μm.
(Level 2) Packaging, Storage and Handling Requirements for Flexo Printing Water Based Inks
Packaging containers and their identification
Sealing packaging ink with plastic buckets can meet the requirements. The packaging should prevent ammonia and alcohol substances in the ink from evaporating. It can prevent dust from falling into the ink and cause the ink ink performance to be unstable. In addition, each ink type, package weight, delivery date, expiration date, manufacturer and contact information should be marked and described.
