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UV ink curing failure solution
To solve the problem of poor curing of UV ink, we must first learn how to check the curing effect of UV ink
1.
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a.
b.
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Some common problems of UV ink curing have been sorted out:
1.
The UV ink is not fully cured, and the adhesion of the ink layer is relatively poor.
To solve the problem of incomplete curing of UV ink, the most thorough way is to use UV ink with a faster curing speed; you can also use ink with higher color concentration to achieve the expected color reproduction with a thinner ink layer, by thinning the ink layer.
2.
The poor adhesion of the printing ink layer is not caused by the ink itself, but is also closely related to the surface properties of the printing material
Option 1: Before printing color ink, apply a layer of medium with good transparency and excellent adhesion by printing to improve the surface properties of the printing material, so that the UV ink can be well attached
.
Option 2: Coat the surface of the substrate with water-based varnish as a primer before printing to solve the problem of poor adhesion of the ink layer such as burst ink and burst edge
.
Waterborne varnishes are applied by roller coating and dried by infrared
.
3.
Analysis and treatment of ink pile problems:
Ink accumulation refers to the accumulation of printing ink on the blanket, printing plate and ink roller, and the transfer of ink is poor, making the printed image on the printed matter relatively blurred
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The main reasons for the failure of stacking ink and dry roller are: poor ink fluidity, poor ink transfer, paper powder peeling and mixing into the ink, and insufficient ink fineness.
If it is offset printing, it may be that the ink is emulsified by the fountain solution
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To solve the problem of stacking ink, you can use varnish or remover to adjust the viscosity and viscosity of the ink
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If it is offset printing, you can use ink with good water resistance, and the amount of water in the printing production process should not be too large
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