Description
CLICK HERE FOR TECHNICAL INFORMATION SHEET
REDDISH HARDENER FOR THE CHEMICAL POST-HARDENING OF STENCILS
The chemical hardening (curing, catalysing) of ready-to-print stencils results in permanent, no longer removable screens. The stencil becomes more water resistant. Depending on the type of emulsion and the type of FOTECHEM Hardener the durability or water resistance of the screen is more or less complete.
FOTECHEM 2100 colour red is economic; most suitable for water resistant (textile) emulsions. After application the curing needs 60°C during 1 hour or 24 hours at room temperature. The drying oven can be used.
Basically water resistant screens (for textile printing) are thoroughly and completely hardened after the treatment. Solvent resistant screens show a higher humidity resistance. Dual-cure (polymer) screens can undergo a negative effect by becoming brittle unless water based inks are used. Difference to post-hardening by exposure Only dual-cure screen emulsions with a content of acrylates can be postexposed. This increases the ink suitability; the removal however does not become distinctively more difficult.