Eco-Friendly Water Based Screen Printing
When it comes to screen printing ink, there are two types: plastisol and water based. Plastisol is the industry standard and the default ink used by commercial printers. It uses a polyvinyl chloride (PVC) base, as opposed to water based ink, which is exactly what its name suggests, a water based ink with pigments suspended within it.
The limitation associated with water based inks is that you cannot print onto dark coloured garments, but they are excellent for printing vibrant colours onto lighter coloured garments. Furthermore, the print result is affected by the colour of the garment. For example, using a purple coloured shirt may change the appearance of the ink colour. Water based inks also do not work well on all materials and are better suited for shorter run orders.
For printing soft prints onto dark coloured garments there is a screen printing technique that uses discharge water based inks.
From Internet