Why do inks fade?

Why do inks fade?

author: Uvink

2023-04-20

There are many reasons for ink fading. It may be the quality of the ink itself, or it may be

a problem with the printing material. It is more likely that a small problem in the printing

process will cause the ink to change color, so high-quality ink should be selected.

and guarantee the quality of the printing process.

The discoloration of the printed matter glazing process, uv glazing, when the ink is dry,

the uv glazing has little effect on the ink color, but when the ink in the contact part of

the glazing oil is not completely dry, due to the benzene and phenol in the uv ink

The dissolution of ink, alcohol, ether and other components will cause the ink to change color

or even fall off. Solvent-based varnish varnish. Since the solvent content in solvent-based

varnish is 50%, the drying time takes about 2-3 minutes, and the ink color is greatly

affected during the drying process.

The discoloration of the ink drying process. In the printing process, the ink color of the newly

printed ink is compared with the ink color of the dried ink. The ink color of the newly printed

ink is darker. After a period of time, the ink color will become lighter after the imprint is dried;

This is not a problem that the ink is not resistant to light fading or discoloration, but mainly

due to the discoloration caused by the ink penetrating and oxidizing the conjunctiva

during the drying process.

Fading and discoloration caused by temperature. Some packaging and decoration trademarks

are pasted on rice cookers, pressure cookers, electronic ignition stoves, and kitchen appliances.

Offset printing machines and other printing machinery are not prepared to run at high speed

when they are working. The ink and the ink roller, the ink and the plate layout will generate

heat at high speed, and the ink will also generate heat at this time.