Abstract: This invention discloses novel pyrrylfluoran compounds useful as the color-precursors or imaging sources in pressure-sensitive copy papers and in thermally-sensitive imaging papers, and a process for preparing these compounds which involves reacting under mild acid catalysis a mixture containing equimolar parts of a 2-amino-6-dialkylaminofluoran and a diketone taken from the group consisting of acetonylacetone, 2,5-heptanedione and 3,6-octanedione.

Abstract: This invention discloses novel pyrazoloxanthene compounds, useful as the color-formers or imaging sources in pressure-sensitive copy papers and in thermally-sensitive imaging papers, and a process for preparing these compounds.

Abstract: Novel fluoran compounds are produced represented by the general formula ##SPC1##Wherein R.sub.1 and R.sub.2 each represent a lower alkyl group containing one to four carbon atoms and wherein R.sub.3 is a cyclopolymethylene group containing from three to four carbon atoms.In another aspect of the invention, pressure sensitive transfer paper is produced, the transfer paper comprising a substrate having coated thereon pressure rupturable capsules containing an organic solvent solution of the novel substantially colorless cyclopolymethylenefluoran compound of this invention, the organic solvent solution of the substantially colorless cyclopolymethylenefluoran compound being capable of forming a colored dye in contact with an electron-acceptor.

Abstract: A polyolefin coated photographic base paper having a silk-like textured surface is prepared by extrusion coating the polyethylene on the photographic paper and, while the polyolefin is still plastic, forming the surface of the polyolefin on an engraved chill roll. Pattern depths of 0.4 to 0.7 mils can be produced on the polyolefin surface by this process using polyolefin films as thin as one mil.

Abstract: A relatively uniform thin coating of a solid phenolic reactant can be applied to a paper base by contacting said paper base with a thin film of a solution consisting essentially of said phenolic reactant in a volatile organic solvent and immediately evaporating said solvent and, unexpectedly, said phenolic reactant is retained essentially completely on the contacted surface of the paper base. Thusly applied, it has been found that well defined colored marks are formed on the surface of the paper base on marking the surface with a colorless marking ink.