58565 ⎘
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; Colour-developing components, e.g. acidic compounds; Additives or binders therefor; Layers containing such colour-developing components, additives or binders Inorganic mineral developers, e.g. clays
CF paper
#2Colour-forming materials, contact recording devices and pressure recording devices
#3NOTE PAD CONTAINING CARBONLESS COLOR-DEVELOPING MATERIAL
#4NOTE PAD CONTAINING CARBONLESS COLOR-DEVELOPING MATERIAL
#5Invisible ink