TYPE OF INK - UV curing water based screen ink.

APPLICATION - Halftone printing on self adhesive PVC.

THINNERS - Upto 15% of tap water.

DRYING - By exposure to jet air followed by UV high pressure mercury vapour lamps.

DRYING TIME - Using a two lamp combi-drier, belt speeds upto 45 metres per minute can be achieved.

EXTENDER - The colour strength of the inks can be adjusted by the addition of extender base UVV815.

ADHESION - Good on self adhesive PVC. Because of the variation in plastic substrates adhesion tests should be carried out before the actual print run.

MESH - The correct deposit of varnish can be obtained using fine calendered meshes in the range of 150T to 180T.

COVERAGE - Up to 100 square metres/litre can be obtained with fine calendered meshes.

STENCILS - Special direct emulsions resistant to water based inks must be used. The number of coatings should be kept to a minimum. This will ensure that the thinnest stencil film is obtained and this will give low ink deposits especially in fine detail areas. Special indirect systems are also now available for UV water based inks.

CLEANING THE SCREEN - At the end of the print run the screens can be washed up with active screen solvent or high pressure water with the aid of a special emulsifier.

SHELF LIFE - Minimum of 3 months.