Solvent inks and eco solvent inks The core of printing is the ink used, solvent ink and eco solvent ink, they are both solvent-based ink, but eco solvent ink is environmentally friendly . Solvent ink "Strong solvent" or "full solvent" ink is an oil-based solution containing pigments and resins. The high VOC (volatile organic compound) content requires ventilation and extraction to protect the printer operator, and many of them retain a distinctive lingering odor on PVC or other substrates that makes the image unsuitable for people to use indoors close enough to the sign to notice the odor. Eco solvent ink Eco solvent ink is derived from ether extracts of refined mineral oils and have relatively low VOC content by comparison, and can even be used in studio and office environments, provided there is adequate ventilation. They are virtually odorless, so they can often be used with interior graphics and signage. Their chemicals do not a...