MS Hardener is a one part emulsion hardener that is applied to both sides of the screen after it is exposed, developed, blocked out, and dried.  It improves stencil water resistance for water base and discharge printing yet still allows for the stencil to be reclaimed. After applying emulsion hardener to both sides of the screen, place in the sun or a  100 degree hot box for optimum results. Screen remains reclaimable when all process techniques are followed.