There are generally two types of ink used for large format printers.
1. SOLVENT: These inks are petroleum or acetone based. So called "Eco Solvent" ink contain glycol ester which results in slower drying and strong odor. The prints come out waterproof and may be used on vinyl as well as foam board, pvc etc. The solvent softens the material and allow the ink pigments latch onto the chemically etched surface. There are three types(Eco-Solvent, Medium Solvent and Full Solvent ) depending on level of solvent ink range. The fume and odor levels decrease accordingly. Therefor Eco - Solvent can be used in office environment.
2.AQUEUS : It is water based type of ink. In this case the pigment is held in non reactive like water or soy based liquid. There are two types of Aqueus Ink: Dye and UV. Dye Ink is high color but low UV resistance. UV Ink is duller in color but with higher UV resistance.Finished prints with Dye Ink must be laminated for protection if they are to be used outdoors. Prints with UV ink can be used unlaminated outdoors. Different materials can be used for printing with this kind of ink(cloth, banners, canvases and metabolized plastics)
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