HARDENER HP (Reclaimable) is a chemical hardener used to increase the water resistance of water resistant emulsions. Unlike other stencil hardeners, HARDENER HP will not result in an un-reclaimable stencil, although it may require slight longer time to reclaim.
HARDENER HP can be used on all emulsions but works best for the
purpose of enhancing the water resistance of emulsions formulated
for good water resistance. Results may vary when using stencil
hardeners in conjunction with emulsions that exhibit very little water
resistance on their own.
User Guide - English