3400 Series UV Screen Ink has been formulated to meet the processing requirements of the membrane overlay market; including compatibility with most standard transfer adhesives, flexibility, opacity, ink to ink adhesion, and speed of cure. The 3400 Series is designed for second surface printing on polycarbonate and polyester used as membrane overlays where the lamination of pressure sensitive adhesive directly to the ink film may be necessary. 3400 Series with the addition of 5% by weight NB80 UV Adhesion Promoter may also be printed over HPIndigo® digital offset prints.
- Substrate polycarbonate, some top coated polyester (UV ink receptive primer), HP Indigo® digital offset prints
- Use direct emulsions and capillary films which are solvent resistant and UV compatible
- 3400 Series is formulated to be press ready
- Thoroughly mix the ink prior to printing
- Improper mixing can lead to inconsistent color and ink performance
- Lower temperatures increase the ink viscosity, impairing flow and increasing film thickness
- Elevated temperatures lower the ink viscosity, reducing print definition and film thickness
- Pretest to determine optimum printing parameters for a particular set of ink, substrate, screen, press, and curing variables/conditions
- The ink can be affected by stray UV light
- Be aware of skylights, windows and overhead lights curing the ink in the screen; light filters are recommended
- Leaving a container uncovered may result in the ink’s surface forming a "skin", caused by reaction with ambient lighting
- Keep containers covered
