The present invention relates to azo dyes of formula

##STR00001##

wherein R.sub.1 denotes hydrogen or C.sub.1-C.sub.12alkyl which is unsubstituted or substituted by one or more C.sub.1-C.sub.12alkoxy groups, C.sub.1-C.sub.12alkylcarbonyl groups, C.sub.7-C.sub.25arylcarbonyl groups, hydroxyl groups, amino groups, cyano groups or halogen atoms and which may be interrupted one or more times by the radical O, S, NR.sub.4, COO or OOC, R.sub.4 is hydrogen or C.sub.1-C.sub.12alkyl; X is hydrogen or halogen; and R.sub.2 and R.sub.3 are each independently of the other hydrogen; C.sub.1-C.sub.12alkyl which is unsubstituted or substituted by cyano, carboxy, hydroxy, C.sub.1-C.sub.6alkoxy or C.sub.2-C.sub.8alkoxyalkoxy; or are C.sub.7-C.sub.25aralkyl which is unsubstituted or substituted by cyano, carboxy, hydroxy, C.sub.1-C.sub.6alkoxy or C.sub.2-C.sub.8alkoxyalkoxy,
to mixtures containing said dyes and to the use thereof in dyeing or printing semi-synthetic and especially synthetic hydrophobic fibre materials, more especially textile materials.

This invention relates to particles comprising a pigment core particle encapsulated by a polymer, a process for their preparation, electrophoretic fluids comprising such particles, and electrophoretic display devices comprising such fluids.

A thermal transfer recording sheet includes a base material and, on the base material, a yellow-dye layer containing a yellow dye, a magenta-dye layer containing a magenta dye, and a cyan-dye layer containing a cyan dye. The yellow dye and the cyan dye contain compounds having specific structures.

The present invention relates to azo dyes of formula ##STR00001##
wherein R.sub.1 denotes C.sub.1-C.sub.12 alkyl which is unsubstituted or substituted by one or more C.sub.1-C.sub.12 alkoxy groups, hydroxyl groups, amino groups, cyano groups or halogen atoms and which may be interrupted one or more times by the radical O, S, NR.sub.4, COO or OOC; R.sub.4 is hydrogen or C.sub.1-C.sub.12 alkyl; either R.sub.2 is cyano and R.sub.3 is halogen or R.sub.2 is halogen and R.sub.3 is cyano; and Ar represents a carbocyclic or heterocyclic aromatic radical, to the process for the preparation thereof, to mixtures containing said dyes and to the use thereof in dyeing or printing semi-synthetic and especially synthetic hydrophobic fiber materials, more especially textile materials.

In a thermal transfer recording sheet including a base material and a colorant layer, the colorant layer includes a yellow dye layer containing a yellow dye, a magenta dye layer containing a magenta dye, and a cyan dye layer containing a cyan dye, and the cyan dye includes a compound represented by Formula (Ia) or Formula (Ib):

##STR00001##

where R.sub.1 to R.sub.7 are substituents, X.sup. is an anion, and the compound of Formula (Ib) has at least one anionic substituent.

To provide a yellow toner that it provides a sharper color than ever before in small amounts and the hue is greener than ever before, whereby the color range can be increased. Disclosed is a yellow toner containing a binder resin and a yellow colorant, wherein, as the yellow colorant, a compound A represented by the following general formula (1) and a compound B represented by the following formula (2) are contained, and wherein, with respect to 100 parts by mass of the binder resin, a content of the compound A is from 0.5 to 7.5 parts by mass, and a content of the compound B is from 0.5 to 8.0 parts by mass: ##STR00001##

To provide a yellow toner that it provides a sharper color than ever before in small amounts and the hue is greener than ever before, whereby the color range can be increased. Disclosed is a yellow toner containing a binder resin and a yellow colorant, wherein, as the yellow colorant, a compound A represented by the following general formula (1) and a compound B represented by the following formula (2) are contained, and wherein, with respect to 100 parts by mass of the binder resin, a content of the compound A is from 0.5 to 7.5 parts by mass, and a content of the compound B is from 0.5 to 8.0 parts by mass:

##STR00001##

The present invention relates to disperse azo dyes based on diazo components having at least one fluorine-containing substituent and an 2,6-diaminosubstituted pyridine coupling component, to a process for the preparation of such dyes and to their use in the dyeing or printing of semi-synthetic and, especially, synthetic hydrophobic fiber materials, more especially textile materials.

The present invention provides a dye compound excellent in both chroma and light fastness, an ink, and a resist composition for a color filter. The present invention provides an ink and a resist composition for a color filter, in which each of the ink and the resist composition contains a pyridone azo compound having a specific structure.

Provided are a compound that generates an SHG signal but has suppressed generation of a TPF signal. Also provided is a cell examination method using the same. A compound for generating a second harmonic of light, the compound being an azobenzene derivative of formula (1), or a salt thereof. (R1 and R2 independently represent alkyl groups having 6-12 carbon atoms, and R3 to R18 independently represent substituents selected from hydrogen, halogens, alkyl groups, alkoxy groups, aryl groups, amino groups, hydroxyl groups, nitro groups, and cyano groups, but R5 and R6, R9 and R10, R13 and R14, and R17 and R18 may combine together and form a ring structure having 5-7 carbon atoms. X represents N+R19R20R21, a sulfonyl group, a carboxyl group, or an OR group. Here, R19, R20, and R21 independently represent straight-chain or branched alkyl groups having 1-5 carbon atoms, and OR represents a monovalent polyalkylene oxide group terminated by an alkoxy group. a is 0 or 1, b is 0 or 1, and n is an integer of 1-10.)