When should I use water resistant emulsion?

Depending on your applications you may need a water resistant emulsion. In the USA the vast majority of textile printers use Plastisol ink. The best emulsions for them are generally photopolymer emulsions that are fast but don’t have a great deal of water resistance. However, if they are printing a discharge ink then a water resistance emulsion is needed because the ink is extremely aggressive to the emulsions.