photoluminescent safety sign need to use photoluminescent printing ink, photoluminescent printing ink used in the signage industry, manufacturers are generally used according to their intended use and signage products themselves formulated to get the best use of effects and economic costs.
Usually adding a certain percentage of the ordinary transparent ink photoluminescent materials by simple mixing process can be made luminous ink use, if stored for a period of time sufficient to facilitate wetting photoluminescent materials inks, printing products resulting surface smoothness will be better. The specific choice of transparent silk screen inks and substrates to be relevant, simply choose the appropriate application of transparent ink to the substrate.
The amount of luminescent pigment: typically 30-50% of the total (photoluminescent materials and transparent ink 1: 1-1: 2), to determine the brightness of the print request amount of photoluminescent pigment. The content of the ink, the higher the printed products with its brightness, the longer the light emission time. Processed light-emitting ink viscosity at 300-500Pa • S, at the time of printing, the printing speed should be controlled, with a diluent to adjust the ink viscosity to suit the requirements of the printing.
Screen printing pattern with luminous ink, marking time, generally choose 200 mesh polyester mesh, to get the best results you can use larger particles emitting high-brightness photoluminescent pigment (eg GL-2 SL-2, etc.) using 80-100 purpose screen printing.
The best luminous ink printed on a white base, reflecting the effect of improving the use of the underlying pattern or logo printed luminous brightness and afterglow time. If the substrate is not white or colored, white or light-colored require printing ink on the substrate obtained above, the thickness of 0.1-1.0mm. Printing ink luminous coating thickness control 130-150μm, the luminous best, as with 80-mesh screen printing twice, you can achieve this thickness.
Generally better signage and other requirements luminous areas, multi-purpose use of 80-100 mesh, glow while to get better, but the apparent poor printing results, the surface is rough, and sometimes need to surface again The purpose of screen printing over 160 smaller (eg 8C-a) products are better surface smoothing effect, the brightness can be guaranteed, but the process is more complex and require cogmprehensive consideration of cost-effectiveness and other factors.