5 Points for UV Flatbed Printer You May Not Know
Cold knowledge One: The curing speed of UV ink is affected by color M, Y, C and K in this order, especially if K is printed at high density, the curing may occur incomplete. The curing speed of the color has little difference between M and Y, but C slows down, especially K slowly protruding. The reason for this is that the carbon absorption light used in black UV ink is irradiated with UV light, does not fully produce the starting point of reaction, and the curing becomes incomplete. M and Y almost do not absorb ultraviolet light, while C,K, especially black, absorbs ultraviolet light to a large extent
Cold knowledge Two: The concentration control of black UV ink is very important for black UV ink gray. If the black is too large, there is a risk of poor curing and adhesion, resulting in adhesion, making it difficult to absolutely control the density of black UV ink. Cold knowledge
Three: UV ink has a great influence on the viscosity of temperature change
UV ink with temperature changes tend to have large viscosity changes in UV printer cooling in the morning, UV ink may be too hard, midday temperature warming, heat, then UV ink will become soft. In order to maintain the fluency of UV ink, will generally be installed in summer air conditioning, winter installation heating. Cold knowledge
Four: UV ink gloss is lower than oily ink and oil-based ink is difficult to obtain high gloss because UV ink curing speed is very fast, and before it becomes smooth and smooth it will solidify after printing. Gloss becomes difficult to appear because the light is reflected on the surface of the UV ink. Cold knowledge
Five: Can not copy the UV ink in the middle color UV ink neutral color (light beige, light gray and other subtle colors) difficult to reproduce, before each printing, need to test the UV printer.
