Screen Printing Photo-Luminescent Safety Sign

Luminescent safety signs require the use of luminescent ink. This luminescent ink is used in the signage industry. Manufacturers usually customize it based on their intended use and the specific signage products to achieve the best performance and economic cost.
Usually, a certain proportion of luminescent materials is added to the ordinary transparent ink, and it can be made into luminescent ink for use through a simple mixing process. If the luminescent ink containing the luminescent materials is allowed to be moistened for a sufficient period of time, the surface finish of the printed product will be better. The specific selection of transparent screen printing ink depends on the substrate. Just choose the appropriate transparent ink and apply it to the substrate.
The amount of luminescent pigment: generally accounts for 30-50% (luminescent materials and transparent ink in a ratio of 1:1 – 2:1), to determine the amount of luminescent pigment required for the brightness of the printed product. The higher the content of the ink, the higher the brightness of the printed product and the longer the luminescence time. The viscosity of the processed luminescent ink is 300-500 Pa•S. During printing, the printing speed should be controlled, and the ink viscosity should be adjusted with a diluent to meet the printing requirements.
For screen-printed patterns, luminescent ink is used. During marking, a 200-mesh polyester mesh is generally selected. To achieve the best effect, larger-sized luminescent high-brightness luminescent pigments (such as GL-2, SL-2, etc.) can be selected and printed using an 80-100 mesh screen.
Nightlight ink is best printed on white substrates. The use effect reflects the improvement of the nightlight brightness and afterglow time of the underlying pattern or logo printing. If the substrate is not white or colored, white or light-colored printing ink should be applied on the substrate with a thickness of 0.1-1.0mm. The thickness of the luminescent coating of the printing ink should be controlled at 130-150 μm, and the luminescent effect is the best. For example, using 80-mesh screen printing twice can achieve this thickness.
Generally, signs and other requirements for luminescent areas are better, and 80-100 meshes are often used. Although luminescence can achieve a good effect, the printing effect is significantly poorer, the surface is rough, and sometimes surface treatment is required. The surface smoothness effect is better for products with a smaller size (such as 8C-a), and the brightness can also be guaranteed. However, the process is more complex and needs to comprehensively consider factors such as cost-effectiveness.