What are the causes and solutions of self-adhesive label ink printing?

The reasons and solutions for self-adhesive label ink printing are as follows:

Cause analysis

Paper factor:

The paper itself is too thin to effectively block ink penetration.

The paper is not tight enough, so that ink can easily pass through the paper.

Ink factor:

The ink is too thin and contains too much interconnecting material, resulting in a large amount of connecting material being absorbed by the paper and penetrating into the reverse side of the paper.

Too much non-dry interlinking material in the ink makes the paper conjunctiva slow at high temperatures, and the ink dries faster, thereby increasing the possibility of ink penetration into the reverse side of the paper.

The ink is too thick and the drying speed is slow, so that the connection material has penetrated into the inside of the paper before the ink is completely dried.

The oil-soluble pigment in the ink is dissolved in the binder and permeates into the back of the paper with the binder.

Printing process factors:

The printing pressure is too large, resulting in excessive ink extrusion of the paper, increasing the possibility of ink penetration.

Insufficiently drying of the ink causes the ink to penetrate before it is fully cured on the surface of the paper.

solution

Choose the right paper:

Use a tight, moderate thickness of paper for printing to improve the paper's ability to block ink.

Adjust the ink formula:

Add No. 0 ink mixing oil to the ink appropriately to enhance the adhesion of the ink and reduce the penetration phenomenon.

Avoid the use of non-dry or high water permeability ink connection material, reduce the non-dry components in the ink.

Adjust the viscosity of the ink to ensure that the ink can be evenly transferred and quickly dried during the printing process.

Optimize the printing process:

Properly reduce the printing pressure and reduce the extrusion effect of ink on paper.

Improve the drying speed of the ink, such as using fast drying ink, increasing the power of the drying device or extending the drying time.

The method of deep ink thin printing is used to reduce the thickness of the ink layer and reduce the risk of ink penetration.

Other support measures:

A powder spraying device is installed on the receiving part of the printing press to disperse fine particles of calcium carbonate between the self-adhesive label sheets to inhibit ink penetration and backside rubbing.

Keep the printing environment clean and suitable temperature and humidity conditions to reduce the impact of impurities such as dust and paper on the printing quality.

In summary, by selecting the appropriate paper, adjusting the ink formula, optimizing the printing process and taking other auxiliary measures, the problem of printing ink through the self-adhesive label can be effectively solved and the quality and stability of the printed matter can be improved.