Five pieces of knowledge of uv ink

author: Uvink

2022-11-16

Five pieces of knowledge of uv ink.First, the curing speed of uv ink is

affected by the color. M, Y, C and K are in this order. Especially if K is

printed with high density, incomplete curing may occur. The curing speed of

color is almost no difference between M and Y, but C slows down, especially K

slowly highlights. The reason is that the carbon used for black UV ink absorbs

light. Even if uv light is used for illumination, the reaction starting point cannot

be fully generated, and the curing becomes incomplete. M and Y hardly absorb

ultraviolet light, while C, K, especially black, absorb ultraviolet light to a large extent.

Second, the concentration control of black uv ink is very important,

black uv ink is gray. If the black color is too large, it may lead to poor curing

and adhesion, which may lead to adhesion. Therefore, it is difficult to absolutely

control the density of black uv ink.

Third, the viscosity of uv ink varies greatly with temperature. In the morning when

the uv printer cools down, the uv ink may be too hard. When the temperature rises

and becomes hot at noon, the uv ink will become soft. In order to maintain the

smoothness of uv ink, air conditioners are generally installed in summer and

heaters are installed in winter.

Fourthly, the glossiness of uv ink is lower than that of oil-based ink. The reason

why it is difficult to obtain high gloss compared with oil-based ink is that

uv ink is very fast in curing, and it will be cured after printing before it becomes

smooth and smooth. Because the light diffuses on the surface of the uv ink,

the gloss becomes difficult to appear.

Fifth, it is impossible to copy the intermediate color in the uv ink. The neutral

color (light beige, light gray and other subtle colors) of the uv ink is difficult

to reproduce. Before each printing, the UV printer needs to be tested.