Does the general gift bag require higher purity?

If the printing ink of Dalian gift bags exceeds the shelf life, the printing ink may be poor drying due to the photoinitiator failure in the printing ink. Additives such as toner and visbreaker are often needed in ink. If the proportion of additives is too high, it may lead to too thin UV ink and poor drying. You can also remove the cots and soak them in UV toner for 12 to 24 hours.

It is difficult to absorb photoinitiator in UV ink when it reaches saturation state. Color is a component element of color printing packaging which can stimulate sales. Highlighting the tone combination of commodity characteristics can not only strengthen the brand characteristics, but also have a strong appeal to customers. Process adjustment of coated base paper: Bleached chemical wood pulp is used in all the pulp fibers of base paper, and the amount of pulp is increased to strengthen the coverage of lining mechanical pulp.

The neutral alkaline sizing process was adopted to reduce the amount of aluminium sulfate in the pulp and increase the 13H value of the base paper. The liquid whitening agent with better quality must have higher purity. The liquid whitening agent with poor purity will not only cause unnecessary waste, but also easily form yellowing phenomenon. In addition, fluorescent whitening agent should be used well in paint formulation, and the application of whitening agent carrier (auxiliary adhesives) should also be paid attention to.

Good affinity and high sun resistance. Therefore, the selection of high-quality organic pigments, its various aspects of performance is relatively ideal. More attention should be paid to the dosage of toner pigments, because too high or too low dosage can not achieve the purpose of toner. Excessive yellowing will aggravate the yellowing degree of coated white board, while too low will not achieve the desired whiteness.

It is necessary to select offset printing ink with stable quality, deviation of color or smaller color deviation. A variety of printing, as far as possible fixed use of a manufacturer produced ink, printing, as far as possible use the same manufacturer, produced the same batch of ink. Some packaging boxes need to be customized to print spot colours, especially one-time adjustment of ink.