Abstract: A pressure sensitive manifold sheet characterized in that a chelate record material comprising an iron (III) compound and/or a vanadium compound, and an aromatic compound having at least one of hydroxyl group and mercapto group on the aromatic ring in combination therewith is used further in combination with an infrared absorbing organic compound.

Abstract: This invention relates to 3-aryl or heteroaryl-3-alkoxy, phenoxy-, alkylthio- or phenylthiophthalides useful as color formers, particularly in carbonless duplicating and thermal marking systems, which are prepared by the interaction of 2-(disubstituted amino)phenylcarbonylbenzoic acids with an acid chloride or an anhydride of an alkanoic acid in the first step and a further reaction of the product of the first step with an alcohol, a thioalcohol, a phenol or a thiophenol in a second step.

Abstract: The invention relates to ring-substituted 4-azaphthalides of formula ##STR1## wherein Q is a substituted phenyl radical of the formula ##STR2## or a 3-indolyl radical of the formula ##STR3## Y.sub.1 and Y.sub.2 are hydrogen, unsubstituted or substituted alkyl, acyl, or unsubstituted or substituted benzyl,Z.sub.1 and Z.sub.2 are hydrogen, lower alkyl or phenyl,R.sub.1 and R.sub.2, together with the nitrogen atom to which they are attached, are a 5- or 6-membered, preferably saturated, heterocyclic ring,X is hydrogen, halogen, alkyl, alkoxy, acyloxy, benzyl, phenyl, benzyloxy, phenoxy, substituted benzyl or benzyloxy, or is the --NT.sub.1 T.sub.2 group, in which T.sub.1 and T.sub.2 are hydrogen, lower alkyl, cycloalkyl, unsubstituted or substituted benzyl or is acyl, and T.sub.