| 摘要 |
<p>1308016 Colour-reactive recording sheets FUJI PHOTO FILM CO Ltd 12 May 1970 [12 May 1969] 22966/70 Heading D2B [Also in Division C3] A developer sheet for pressure-sensitive recording paper comprises a support, e.g. of paper, and a coating layer of an electron-accepting solid acid, e.g. clay, and an alkali-metal salt of an organic acid. Salts named are the formates, acetates, propionates, butyrates, monochloracetates, dichloracetates, oxalates, malonates, acrylates, vinylacetates, phenylacetates, benzoates, benzenesulphonates, succinates, glutarates, adipates, maleates, fumarates, toluenesulphonates, oxalacetates, tartrates and citrates of lithium, sodium and potassium; rosin is disclaimed. Binders referred to in the examples are a styrene-butadiene latex and an acrylic-butadiene latex. The other colour reagent may be in microcapsules on the same sheet, or on a separate sheet.</p> |
