When using uv printing such as ceramic tile glass, it needs to pretreat with coating first. Different coating materials are used for different requirements. The coating materials are good to choose from adhesion, leveling, membrane transparency, ease of use, weather resistant ability and safety.
Coating is an important consumable material in many UV flatbed printers. It plays a key role. It has the advantages of excellent color, fast drying, strong operation, strong water resistance and small discoloration. The greatest advantage of UV flatbed printer coating is that it enhances with ink. The right choice of uv plate printer coating not only guarantees the quality of printed products, but also has a significant impact on protecting expensive equipment.
To select the uv flatbed printer coating, please pay attention to the following six aspects:
1.Adhesion: there are many methods for measuring adhesion, such as the 100-grid method. If the quality of the printed product is high, it can also test whether the printed product will fall off after soaking water or boiling water. Adhesion is the key to measuring the coating of uv flatbed printer. High quality uv flatbed printer coatings should be tested through the 100 – grid test and will not fall off after soaking or boiling water.
2 Polished flow property: It is a common performance indicators in the coating, and refers to the coatings by brushing or spraying on the surface. The coating of brush and spray fog particles such as automatic flow show flat and smooth surface. The unsmooth uv flatbed printer coating can affect the decorative effect of the printed material. More importantly, if the brush mark on the surface of the coating does not automatically disappear, the uneven surface of the coating may rub off the nozzle of the uv printer, causing a significant loss. High quality uv flatbed printer coating should be well-formulated, flush quickly after brushing or spraying.
3 Membrane transparency: as high value-added decorative products, UV prints generally have a high appearance requirements. This requires the uv flatbed printer coating to be colorless and transparent. Now there are some two – component coatings on the market with epoxy resin. It will affect the decorating effect.
4.Weather resistant ability: for the printing of UV flatbed printers, especially in the outdoor use of signs, billboards, prints must be long and bright as new and not fade. Specifically, the uv printer coating has the function of resisting uv. Now some uv printer coating will be yellowed under long-term light conditions, which is not suitable for outdoor use. Even UV printing products that are only used indoors will generally need to consider the use of weather-resistant UV printer coatings, to ensure product quality.
5 Ease of use: the uv printer coating on the market has uni-components or multi-component products, which needs to be configured according to the manufacturers specific proportions before use. Compared with multi-component products, uni-component uv printer coating that does not need to be configured have a greater advantage in use.
6 Product safety: product safety is also a problem to be considered in selecting uv printer coating. The uv printer coating of the solvent is not only odour, but also is not convenient in storage and transportation.