The film must be side inverted. Colour specifications (Pantone, HKS, RAL) are required. Please consider following for halftone prints: Screen is halftone 48, (48 lines per centimeter), Halftone is between 20 and 80%. • Minimum line thickness for films (screen- and pad imprint) positive 0,15 mm and negative 0,3 mm. • For screen- and pad-prints according to Pantone, HKS or RAL on coloured barrels please consider that it might be necessary to print white backround (i.e. one printing colour additionally).