Abstract: A metal-containing indoaniline compound having the formula: ##STR1## wherein M is a metal atom of Group VIII, Ib, IIb, IIIb, IVa, Va, VIa or VIIa of the Periodic Table or its halide or oxide, rings A, B, C, D, E and F may have substituents, each of K.sup.1 K.sup.2 and K.sup.3 is a residue of a substituted or unsubstituted aromatic amine, each of l, m and n is 0 or 1, provided l+m+n=2 or 3, and p is 2, 3 or 4.

Abstract: An optical recording member comprising a recording layer containing a light abosrbing substance supported on a substrate in which recording is made by the thermal deformation of the recording layer owing to laser beams and reproduction is made by the reading the difference of the reflection between the non-deformation portion and the deformation portion, said light absorbing substance being represented by the following formula: ##STR1## wherein one of X and Y is --O(C.sub.2 H.sub.4 O).sub.n R wherein R is an alkyl group which may be branched and n is a number of from 1 to 6, and the other is a hydrogen atom, and A is VO, Cu, Ni, or Co.

Abstract: A monoazo dyestuff of the formula: ##STR1## wherein D represents substituted or unsubstituted phenyl, imidazolyl, pyridyl, thiazolyl, thiadiazolyl, thienyl, benzoisothiazolyl, pyridinoisothiazolyl, thienoisothiazolyl, thienothiazolyl or benzothiazolyl, R.sup.1 represents substituted or unsubstituted alkyl, cyclohexyl, alkenyl, aralkyl or aryl, R.sup.2 and R.sup.3 each represents hydrogen, alkyl optionally substituted by cyano, hydroxy, alkoxy or alkoxyalkoxy, alkenyl, cyclohexyl, aryl or aralkyl, or together represent a 5- or 6-membered nitrogen-containing heterocyclic ring formed by combining R.sup.2 and R.sup.3, A represents ##STR2## X represents fluorine or chlorine, and Y.sup.1 represents hydrogen, chlorine, methyl or acylamino. The monoazo dyestuff is especially useful in the dyeing of cellulose-containing fibers and exhibits good fastness properties including good wet color fastness and good light fastness.

Abstract: An optical recording member for performing recording and reproduction of information by causing changes in the state thereof with a laser beam, which optical recording member comprises a base plate and a recording layer provided on the base plate and containing therein a phthalocyanine type compound and/or naphthalocyanine type compound represented by the following general formula: ##STR1## (where: R.sup.1 to R.sup.4 represent substituted and/or unsubstituted alkyl group, alkoxyalkyl group, aryl group, and so forth; and A denotes Pb, Sn, Cu, Ni, VO, and so on).

Abstract: An optical recording medium is disclosed, comprising a support having provided thereon a recording layer containing a naphtholactam dye represented by formula: ##STR1## wherein K represents a substituted or unsubstituted aromatic amine residue; R represents a substituted or unsubstituted alkyl group, a substituted or unsubstituted cycloalkyl group, a substituted or unsubstituted aryl group, or a substituted or unsubstituted allyl group; Z.sup.- represents an anion; ring A represents a substituted or unsubstituted naphthalene ring; and m represents 1 or 2. The recording layer can be formed by coating easily, has a high reflectance to provide a satisfactory contrast of recording, and exhibits excellent resistance to light.

Abstract: An optical recording medium in which recording and/or reproducing is made by the state changes of material owing to laser beams, comprising an indophenol-group dye supported on a substrate.