UV offset printing ink printing failure analysis of the cause of poor glossiness and its solution

UV offset printing ink printing failure analysis of the cause of poor glossiness and its solution

Insufficient brightness (lustre difference)

Cracked whitening. The main reason is that the ink transfer performance is too poor, two is that the printing plate is too shallow and easy to make the solvent in the ink system volatile too fast.

General imprinting leads into the membrane rough bad, especially the ink system or ink diluent and adding whitening moisture inhalation, mostly in summer workshop humidity is too high in the environment.

Treatment methods: replace the transfer of good ink or replace the deeper plate, the third adding slow drying solvent treatment.

Whitening of the whole blot. The main reason is the continuous printing time is too long, the operator found in the viscosity of the ink sticky and thick, adding a single solvent, thus breaking the original ink system in mixed solvent volatilization gradient balance, resulting in printing ink film, rough white ink layer. The two is the operator even added a mixed solvent, but excessive added tend to make the ink synthetic resin content is relatively reduced, the whitening phenomenon also occurs in the same way. One approach is to slow solvent adding 3% ~ 7%, especially plasticized ink and water molecules in archegoniophore intrusive solvent; two is the selection of special diluent containing resin; three is adding 5% ~ 15% of the ink in the ink, in order to overcome the deficiency caused by the resin content of white four, in the workshop of central air conditioning installation can control the temperature and humidity or moisture absorber elimination.

The albino phenomenon listed above will be glossy. Sometimes it does not reach albinism, it also affects the gloss of the ink film after printing.