What are the requirements for the color ink of the membrane switch panel layer?
Gavin Xu(Membrane switch)
Engineer and Sales Manager,JCF Technology have own perfect membrane switches, PCB membrane keypads, FPC membrane circuits,Rubber silicone keypad engineering development & design,production and quality control system.
There are 6 requirements for the color ink of the membrane switch panel layer
1. Graphic overlay inks are solvent-volatile inks. There are many types of inks of this type, but they should be considered in terms of?ink fineness, pure hue, strong covering power, and combination with the base PET. It is recommended to use the following ink brands:German Pool Dragon T-J series, Japan Seiko GAP series, Lisada GV series, etc.
2. The membrane switch panel is printed on the reverse side and the reverse side pattern is printed on the smooth side of the PET ( the?PET use the brand AUTOTDEX material).
3. Operate according to the requirements of solvent volatile ink (for example, the ink needs to be fully stirred before printing).
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4. For the color printing layer by layer, the dark color should be followed first, and the light color should be printed twice as much?as possible for the light color block printing to ensure its covering, so as to improve the ink color saturation and avoid the ghosting of color overprinting.
5. Pay attention to prevent the color of the light-colored ink from changing when the dark-colored bottom is overprinted with the light-colored ink. The light-colored ink should be printed with a blank plate as much as possible to reduce the influence of the dark ink on the light-ink color. printing ink increased thickness, but must be baked to allow for enhanced ink color coverage.
6. Pay attention to the requirements for the color of the back printing. Generally, white and silver are printed. Its function is to?prevent the circuit pattern behind the membrane panel from being exposed, and at the same time, it does not change the color of the color ink, and can set off the color of the ink printed on the film panel first. Therefore, the printing ink on the back requires strong covering. If the printing effect is not good, printing it once will not work, but printing it twice can achieve the effect.
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