Composition for the colour developing coating in pressure...

B - Operations – Transporting – 41 – M

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B41M 5/155 (2006.01)

Patent

CA 1188513

A B S T R A C T New composition for the colour developing coating in pressure sensitive carbonless copying systems. This invention relates to sheet materials, on which a coating is applied and which are used for pressure sensitive carbonless copying systems, wherein at least one of the components responsible for colour development in the coating is a predomina- bly white four layer structured lamelar ground chlorite mineral having an iron content of about 0.5 % to 8 % by weight,preferably of about 3% by weight. The components responsible for colour development in the coating are preferably composed by 40 to 60 % by weight of said ground chlorite mineral and 60 to 40 % by weight of activated montmorillonite or bentonite or smectite clay . The invention relates also to coating compositions for the manufacture of a sheet material on which a coating is applied and which is used for pressure sensitive carbonless copying systems, said composition containing a predominably white four layer structured lamelar ground chlorite mineral having an iron content of about 0.5% to 8 % by weight, preferably of about 3 % by weight.

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