A curable composition includes: a near infrared absorbing compound that includes a cation having an absorption in a near infrared range and an anion; a salt of an anion that is a component other than the near infrared absorbing compound and has a conjugate acid pKa of −8 or lower; and a curable compound.

A curable composition includes: a near infrared absorbing compound that includes a cation having an absorption in a near infrared range and an anion; a salt of an anion that is a component other than the near infrared absorbing compound and has a conjugate acid pKa of −8 or lower; and a curable compound.

The present disclosure concerns the design, formulations, preparations and optical properties of compounds of Formulas (I) and (VI):

(charged dye.sup.m+).sub.x.Math.(counterion.sup.n).sub.y.Math.(counterion receptor).sub.z(I) and

(charged dye.sup.m).sub.x.Math.(counterion.sup.n+).sub.y.Math.(counterion receptor).sub.z(VI).

The charged dye.sup.m+ is a cationic dye, counterion.sup.n is an anion, and counterion receptor is a binding ligand for the counterion.sup.n, wherein m, n, x and y are integers greater than or equal to 1, and products of x.Math.n and m.Math.y are identical for formula (I).

The charged dye.sup.m is a anionic dye, counterion.sup.n+ is a cation, and counterion receptor is a binding ligand for the counterion.sup.n+, wherein m, n, x and y are integers greater than or equal to 1, and products of x.Math.n and m.Math.y are identical for formula (VI).

The present disclosure concerns the design, formulations, preparations and optical properties of compounds of Formulas (I) and (VI):

(charged dye.sup.m+).sub.x.Math.(counterion.sup.n).sub.y.Math.(counterion receptor).sub.z(I) and

(charged dye.sup.m).sub.x.Math.(counterion.sup.n+).sub.y.Math.(counterion receptor).sub.z(VI).

The charged dye.sup.m+ is a cationic dye, counterion.sup.n is an anion, and counterion receptor is a binding ligand for the counterion.sup.n, wherein m, n, x and y are integers greater than or equal to 1, and products of x.Math.n and m.Math.y are identical for formula (I).

The charged dye.sup.m is a anionic dye, counterion.sup.n+ is a cation, and counterion receptor is a binding ligand for the counterion.sup.n+, wherein m, n, x and y are integers greater than or equal to 1, and products of x.Math.n and m.Math.y are identical for formula (VI).

The present invention relates to storage-stable dye salts, solutions and compositions thereof a process for their preparation and their use for dyeing and/or printing substrates.

A fluorescent dye and quencher mixture for reporting on nucleic acid amplification from a sample includes a fluorescent intercalating dye, a dye sequestering or quenching agent such as hydroxynapthol blue (HNB) or caffeine, and primers, dNTPs, and a nucleic acid polymerizing enzyme or fragment thereof. The presence of the dye in combination with the dye sequestering or quenching agent improves the overall dynamic range of the fluorescent signal as well as shortens the time needed for visualization or image capture of amplified nucleic acid. The fluorescent dye and quencher mixture also enables the detection of nucleic acids in samples having low copy numbers.

A curable composition includes: a near infrared absorbing compound that includes a cation having an absorption in a near infrared range and an anion; a salt of an anion that is a component other than the near infrared absorbing compound and has a conjugate acid pKa of 8 or lower; and a curable compound.

The invention relates to the dyeing of human keratinous fibers, in particular the hair, using anionic direct dyes or acid dyes having a tetraalkylammonium counterion of formula (I), with Col.sup.()m, R.sub.1, R.sub.2, R.sub.3, R.sub.4, m, and n as defined in the description. A subject-matter of the invention is a dyeing composition comprising an anionic dye of formula (I) and a method for dyeing keratinous fibers, such as the hair, employing the said composition. A subject-matter of the invention is likewise novel dyes of formula (I) and their uses for the coloring of keratinous fibers. This composition makes it possible to obtain a chromatic, powerful and particularly persistent coloring on keratinous fibers. ##STR00001##

The invention relates to the dyeing of human keratinous fibers, in particular the hair, using anionic direct dyes or acid dyes having a tetraalkylammonium counterion of formula (I), with Col.sup.()m, R.sub.1, R.sub.2, R.sub.3, R.sub.4, m, and n as defined in the description. A subject-matter of the invention is a dyeing composition comprising an anionic dye of formula (I) and a method for dyeing keratinous fibers, such as the hair, employing the said composition. A subject-matter of the invention is likewise novel dyes of formula (I) and their uses for the coloring of keratinous fibers. This composition makes it possible to obtain a chromatic, powerful and particularly persistent coloring on keratinous fibers. ##STR00001##

A method for preparing a colorant for use in an ink composition including a substantially non-aqueous carrier composition includes providing a chromophore precursor including one or multiple functional groups which may be subjected to a chemical reaction to form a salt with a preselected counter ion; providing a salt including the preselected counter ion; and providing an organic solvent that is not miscible with water and wherein the reaction product of the chromophore precursor and the salt including the preselected counter ion is soluble; preparing a chromophore precursor solution in water by dissolving a quantity of the chromophore precursor in water adding a quantity of the organic solvent while stirring; adding the salt including the preselected counter ion while stirring to form a resalted chromophore; separating the resalted chromophore from the reaction mixture. The addition of the salt including the preselected counter ion is performed until a molar excess of counter ion has been added with respect to the molar amount of functional groups comprised in the chromophore precursor; A colorant is obtainable and an ink composition includes such a colorant.