A printing ink composition includes a disperse dye, a surfactant, a water soluble dye, and a dispersant, in which an IOB value A of the disperse dye, an IOB value B of the surfactant, and an IOB value C of the water soluble dye satisfy the following Equation (1), A<B<C (1), and the IOB value B is 1.0 to 2.0.

A printing ink composition includes a disperse dye, a surfactant, a water soluble dye, and a dispersant, in which an IOB value A of the disperse dye, an IOB value B of the surfactant, and an IOB value C of the water soluble dye satisfy the following Equation (1), A<B<C (1), and the IOB value B is 1.0 to 2.0.

The present invention provides an ink jet recording ink including a dye which has a weight average molecular weight of 850 or less and is represented by Formula (1) below, a water-soluble organic solvent which has an SP value of 9.4 or more and less than 9.75 and is represented by Formula (2) or (3) below, and water, in which the content of a surfactant is less than 0.1% by mass. R.sub.1, R.sub.2: H, a halogen atom, OH, COOH, C1-C6 alkyl group, C1-C6 alkoxy group, NO.sub.2, an azophenyl group, -L1-Ra and the like, L.sub.1: O, CH.sub.2, C.sub.6H.sub.4, N═N, SO.sub.2 or a combination thereof, Ra: a phenyl group, a naphthyl group, or the like, R.sub.3: H, an azophenyl group, an azonaphthalene group, -L.sub.2-Rb or the like, L.sub.2: C(═O), C.sub.6H.sub.4, N═N, NH, SO.sub.2 or a combination thereof, Rb: a phenyl group, a naphthyl group, a pyrimidyl group, or the like; M.sup.+: H.sup.+, Na.sup.+, NH.sub.4.sup.+, an alkylammonium ion or the like, R: C2-C6 unsubstituted alkyl group, and n is 1 to 3. ##STR00001##

A building construction product comprising an ionochromic dye, wherein the building construction product has a first color when the product comprises water, wherein the first color is dependent on the presence of metal ions in solution in the product; and wherein the product has a second color when the product has solidified. Methods of monitoring setting and drying reactions of building construction products, including setting-type and drying-type joint compounds and plasters.

A building construction product comprising an ionochromic dye, wherein the building construction product has a first color when the product comprises water, wherein the first color is dependent on the presence of metal ions in solution in the product; and wherein the product has a second color when the product has solidified. Methods of monitoring setting and drying reactions of building construction products, including setting-type and drying-type joint compounds and plasters.

A blue ink-jet ink that improves lightfastness of the same while maintaining its blue print color and a tablet including a part printed with the blue ink-jet ink. The blue ink-jet ink according to the present embodiment is an edible ink-jet that contains Brilliant Blue FCF (Blue No. 1 Colorant) and New Coccine (Red No. 102 Colorant) as colorants.

A building construction product comprising an ionochromic dye, wherein the building construction product has a first color when the product comprises water, wherein the first color is dependent on the presence of metal ions in solution in the product; and wherein the product has a second color when the product has solidified. Methods of monitoring setting and drying reactions of building construction products, including setting-type and drying-type joint compounds and plasters.

A building construction product comprising an ionochromic dye, wherein the building construction product has a first color when the product comprises water, wherein the first color is dependent on the presence of metal ions in solution in the product; and wherein the product has a second color when the product has solidified. Methods of monitoring setting and drying reactions of building construction products, including setting-type and drying-type joint compounds and plasters.

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 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.