SLT is cold foil Printing is an in line process that works on rotary letterpress and rotary flexo pres Cold Foils which can be used on a wide range of substrates, like papers and all types of label material, featuring good halftone effects, precise definition and over-printability. Substrates plastic materials like PE, PP, PET papers with non-absorbent surfaces Coloursgold,silver, green, red, ...