On the preventive measures to control the printing failure

Failure 1: Shrink

After printing, the ink film on the surface of the product retracts, so that the larger surface of the printing surface is exposed to the surface of the substrate. This phenomenon is called shrinking. This is due to poor wetting of the substrate by the printing ink. If the surface of the substrate contains oil stains, the surface of the plastic and the surface of the electrodeposition printing ink containing too many anti-scratch additives, etc., the printing plate is not eccentric or eccentric, and the direction of advance shrinks (no longitudinal direction), often causing partial shrinkage (break ).

Precautions: Before printing, the surface of the substrate must be strictly degreased. For album printing, select special album printing ink with low surface tension.

Fault 2: pits and pits

Foreign particles are attached to the wet ink film of the printing ink. These foreign particles spread on the wet ink film and repel the surrounding ink to form pits, also known as "pits". Observation can clearly see the presence of foreign particles in the center of the pit, also known as "pitting". This phenomenon generally does not reveal the substrate of the substrate.

Precautions: Control the environment, improve the cleanliness, and ensure the purity of the solvent or thinner without foreign matter.

Fault 3: thick edge

The corners of the ink film are particularly thick after printing, and the finished product looks like a frame, called "thick edge". This is because the solvent of the wet ink film printed on the corners of the corners evaporates faster than other locations, causing the ink concentration at this location to be too high, the temperature is lower than elsewhere, forming a high surface tension zone, so that the adjacent ink flows to the corners, thickening the location Ink film.

Precautions: The printing of picture books improves the thixotropy of printing inks and reduces the printing pressure. An appropriate amount of rheological additives can also be added.

We are professional manufacturer, which is established in 2005 and focus on export business to Europe, USA and Australia.

We specialized in producing various kinds of Paper napkins, like dispenser napkin paper. We can produce at 32cm x 32cm, 33cm x 22cm etc.

We can print 1 or 2 color logo on the napkins. The water ink that we used reach European Food contact grade..

We supply different kinds of materials for Dispenser napkin paper products, like Virgin, Recycled and Bamboo Pulp (Tree free).

The napkin material is 00% biodegradable and compostable, Chlorine free and reach food contact grade standard.

 

Dispenser Napkin PaperDispenser Napkin PaperDispenser Paper Napkin


Dispenser Paper Napkin

Dispenser Paper Napkin,Printed Dispenser Napkin,Personalized Dispenser Napkins,Custom Printed Dispenser Napkins

Bobo Tissue Product Manufacturer , https://www.bobotissues.com