DP Series – Proposition 65 compliant Ink for Polypropylene
DP series is specialty pad and screen-printing ink designed for printing on untreated polypropylene. DP Series is Proposition 65 compliant, unlike many other polypropylene inks on the market. Proposition 65 will be in effect starting in 2007 in the state of California. This high gloss ink for polypropylene has excellent adhesion on most polypropylene substrates. The more pure the substrate, the greater the adhesion without requiring pre-treatment. PP1 adhesion promoter can be added to the DP series ink to improve adhesion.
Syringes & Medical Devices
(2-component usage optional)
Hardeners: DP Series Proposition 65 compliant ink for polypropylene cures by air-drying.
Solvent: The ink should be thinned to printing viscosity with 10% - 30% Type DP-M or Type MS by weight. Adding solvent will make the ink less viscous and dry slower.
Adhesion Improvement: For "non-pure" polypropylene additional modifiers may be used to improve adhesion. Add PP1 Adhesion Modifier to ink up to 15% weight or pre-wipe substrate with PP Primer.
Drying: DP Series Proposition 65 compliant ink for polypropylene cures by air-drying. It will be ready for overprinting in less than 60 seconds and will be dust dry in 20 minutes at room temperatures. Complete cross-linking (full cure) of the inks is realized in 6-8 days at room temperatures. Dust dry and full cure conditions can be significantly accelerated by the application of heat.
Retarder: For fine prints, add Type MS retarder in proportions not to exceed 50% by weight of solvent. Adding too much retarder may inhibit ink transfer from pad to substrate.