Other reasons and Countermeasures for poor adhesio

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Other reasons and Countermeasures for poor adhesion fastness of printing ink


1) poor suitability treatment of printing substrate and low wetting tension

2) the additives in the printing substrate film (how to avoid the trough of plasticizer, interfacial active agent, slippery agent, etc.) form a precipitation layer, which affects the adhesion fastness of the ink layer

3) the printing substrate absorbs moisture by itself

4) poor performance of ink, misuse of ink or mixing of different kinds of ink

5) changes in ink performance (deterioration, bleaching)

6) poor drying and many residual solvents

7) the package contents and environmental conditions reduce the adhesion fastness


1) measure the wetting tension, and replace the printing substrate if it is unqualified. The treatment degree of corona treated film is the most important. Whether the treatment is qualified and whether it should be measured by wetting the tension measuring solution

2) confirm the precipitation of the surface. If the precipitation layer affects the ink adhesion fastness, replace the printing substrate or negotiate with the ink manufacturer for appropriate disposal. When using a certain film for the first time, you should investigate its properties and characteristics as much as possible in advance, and choose the appropriate ink

3) change the ink or confirm the ink adhesion fastness of the ink. Gravure inks are mostly produced for specific purposes, and the cost of hardware replacement is charged. They should be avoided for other purposes or the mixing of different inks. And in order to prevent misuse, the relevant content and date of the residual ink should be clearly recorded for reuse

4) solve the problem of deterioration and bleaching of ink

5) to adjust the drying conditions and solve the residual solvent problem is to vigorously promote China to move towards the "road of rejuvenation", or to reduce the residual solvent source: Sino foreign aluminum processing business information to the specified limit

6) implement humidity control on the printing site. Films and prints such as vinylon, cellophane, nylon, etc., which are easy to absorb moisture, shall be properly kept to prevent moisture

7) fully consider the influence of package contents and environmental conditions on the adhesion fastness of printing ink

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