PRESSURE-SENSITIVE CARBONLESS TRANSFER SHEET AND METHOD FOR PROVIDING A CHEMICALLY FORMED IMAGE ON AN UNTREATED SUBSTRATE

摘要

An encapsulated liquid reactant precursor and a co-reactant therefor are supported on the under surface of a donor sheet that is placed over an untreated surface (i.e, devoid of reactant precursor and co-reactant) of a receptor sheet or other substrate. Upon pressure-effected rupture of the capsules, a substantial amount of both the reactant precursor and the co-reactant physically transfers to the untreated surface to provide, as a chemical reaction product, an essentially smudge-free, eradication-resistant, right-readable image on the untreated receptor surface. This donor transfer sheet and method are especially desirable where the receptor to be imaged is a data processing card or record on which a reactant and/or co-reactant coating could adversely affect processability through data processing equipment; or the receptor to be imaged has a rigid non-flat surface on which a conventional carbonless receptor coating is impractical; or where only a small area of the receptor is to be imaged.