Abstract: Heterocyclic substituted fluoran compounds of the formula ##STR1## wherein R.sub.1, R.sub.2 and R.sub.3 independently of the other, represent hydrogen, alkyl with 1 to 4 carbon atoms, nitro or halogen orR.sub.2 and R.sub.3 together complete a condensed carbocyclic ring,X.sub.1 and X.sub.2 independently of the other, represent hydrogen, alkyl with 1 to 12 carbon atoms, alkenyl with at most 12 carbon atoms, alkoxyalkyl with 2 to 8 carbon atoms, alkoxycarbonylalkyl with 3 to 9 carbon atoms cycloalkyl with 5 or 6 carbon atoms, acyl having 1 to 12 carbon atoms, or optionally substituted benzyl, phenyl or naphthyl, andThe nitrogen ring A represents a heterocyclic radical which optionally includes a further hetero atom as a ring member and the benzene ring B may be further substituted by nitro or 1 to 4 halogen atoms. These fluorans compounds are particularly useful as color formers which give intense dark green, grey black or red colors when they are brought into contact with an electron-accepting co-reactant.

Abstract: Pressure-sensitive copying material containing included in its Color-reactant system a mixture of at least two color formers, wherein at least one color former is a leuco methylene dyestuff of the formula ##EQU1## wherein Y represents an amino-substituted phenyl residue of the formula ##SPC1##Or an indolyl residue of the formula ##SPC2##Wherein R.sub.1 and R.sub.2, independently of the other represent hydrogen, alkyl with 1 to 12 carbon atoms, alkoxyalkyl with 2 to 8 carbon atoms, benzyl or phenyl, R.sub.3 is hydrogen, halogen, nitro, alkyl having 1 to 4 carbon atoms or alkoxy having 1 to 4 carbon atoms, X.sub.1 represents hydrogen, alkyl with 1 to 12 carbon atoms, alkenyl with at most 12 carbon atoms or benzyl, X.sub.

Abstract: Nitro-chromenopyrazole compounds of the formula ##SPC1##WhereinR.sub.1 and R.sub.2, independently of the other, represent hydrogen, alkyl with 1 to 12 carbon atoms, alkoxyalkyl with 2 to 8 carbon atoms, cycloalkyl with 5 or 6 carbon atoms, benzyl or phenyl, andX and Y, independently of the other, represent alkyl with 1 to 12 carbon atoms, alkoxy with 1 to 12 carbon atoms, phenyl or phenyl substituted by alkyl having 1 to 4 carbon atoms, nitro, halogen, amino or an amino group mono- or disubstituted by alkyl with 1 to 12 carbon atoms, acyl with 2 to 12 carbon atoms or benzyl.The nitro-chromenopyrazole compounds are particularly useful as color formers which give intense orange-red color when they are brought into contact with an electron-accepting co-reactant.