B41M5/132 - CPC Classification

Duplicating or marking methods; Sheet materials for use therein using pressure to make a masked colour visible, e.g. to make a coloured support visible, to create an opaque or transparent pattern, or to form colour by uniting colour-forming components Chemical colour-forming components; Additives or binders therefor

• B41M5/136 » Organic colour formers, e.g. leuco dyes 11
• B41M5/155 » Colour-developing components, e.g. acidic compounds; Additives or binders therefor; Layers containing such colour-developing components, additives or binders 28

Recent Application in this class: