A technical problem of the present invention is to provide a condensed polycyclic organic pigment having excellent dispersion properties and dispersion stability. More specifically, the technical problem of the present invention is to provide a condensed polycyclic organic pigment in which a practically sufficient viscosity is achieved in terms of both the initial viscosity of a base ink and the viscosity over time of a base ink when used in the printing ink application. As a result of thorough studies on the surface state of organic pigment particles and interaction among components constituting a printing ink, it has been found that the technical problem can be solved by using a polyvalent metal inorganic salt in a condensed polycyclic organic pigment, thus accomplishing the present invention.

Disclosed is a lycopene food colorant having a fresh-keeping function. The food colorant is prepared from the following raw materials in parts by weight: 1-3 parts of a lycopene crystal, 5-20 parts of an emulsifier, 0.5-5 parts of an antioxidant, 60-70 parts of glycerol, and 10-20 parts of water. The food colorant is prepared by mixing the raw materials and then emulsifying and grinding same. The granularity of the obtained lycopene colorant is moderate; the tone is suitable for coloring a minced fillet product; the lycopene colorant has high tinting strength, achieves a bright color, and has the effect of triggering myoglobin, so that the minced fillet product has a bright color and appears fresher; the lycopene colorant further has a fresh-keeping function and can kill some food microorganisms, so as to keep food fresh and prolong the shelf life.

The invention discloses an environment-friendly leuco dye vegetable oil solvent, prepared from the following components by mass percent: 10-40% of component A, 40-750% of component B and 10-20% of methyl chloride, and the sum of the mass percentage of the above components being 100%. The component A is vegetable oil or vegetable oil methyl ester, and the component B is epoxy vegetable oil or epoxy methyl ester.

The present disclosure provides stabilized hematoxylin formulations having a pH of less than 2.4. The present disclosure also provides methods of using such stabilized hematoxylin formulations to stain biological samples.

An object of the present invention is to provide a dioxazine pigment having excellent fluidity. More specifically, an object of the present invention is to provide a dioxazine pigment in which practically sufficient fluidity is attained in both (1) initial viscosity and (2) storage stability when the dioxazine pigment is used in a printing ink application. The object is attained by providing a dioxazine pigment having a contact angle with respect to water according to an infiltration rate method in a range of 30? to 75?, and a contact angle with respect to 1-bromonaphthalene according to an infiltration rate method in a range of 30? to 75?.

The invention discloses an environment-friendly leuco dye vegetable oil solvent, prepared from the following components by mass percent: 10-40% of component A, 40-750% of component B and 10-20% of methyl chloride, and the sum of the mass percentage of the above components being 100%. The component A is vegetable oil or vegetable oil methyl ester, and the component B is epoxy vegetable oil or epoxy methyl ester.

The present invention solves the problem of providing a method for stabilizing a solid pigment. The problem is solved by a method for stabilizing at least one solid pigment selected from the group consisting of solid carotenoid pigments and solid curcumin pigments, the method comprising the step of mixing the solid pigment with a lipophilic liquid in an amount of 200 parts by mass or less per 100 parts by mass of the solid pigment.

The present disclosure discloses application of a deep eutectic solvent in textile dyeing, belonging to the technical field of ecological dyeing and finishing of textiles. A natural hydrophobic deep eutectic solvent system (HDES) is first used as a dyeing medium to perform reactive dyeing on cotton. Firstly, the prepared natural hydrophobic deep eutectic solvent is mixed with a small amount of dye aqueous solution at high speed to prepare dye liquor, and then cotton fabric soaked with alkali liquor is put into a dye bath for dyeing. The dyeing method doesn't require addition of inorganic salts and other dyeing auxiliaries, but uses a small amount of water and alkali agent to achieve the same dyeing effect as traditional water bath, and the dyeing medium is safe and environment-friendly. After dyeing, cyclic dyeing can be achieved by simply separating the dye bath, which truly realizes green dyeing of reactive dyes.

Methods and compositions for removing precipitates or reducing the formation of precipitates generated in hematoxylin solutions. The methods and compositions feature cleaning solutions that feature chemical compounds that initiate processes including but not limited to acidification of the waste solution, chelation of metal ions in the waste solution, reduction reactions, oxidation reactions, and metal salt addition reactions.

A laundry care composition including: (a) at least one laundry care ingredient and (b) a least one compound represented by Formula (I):

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The ratio of Formula I to its oxidized form is at least 1:3 and each individual R.sub.o, R.sub.m and R.sub.p group on each of rings A, B and C is independently selected from the group consisting of hydrogen, deuterium and R.sup.5. At least one of the R.sub.o and R.sub.m groups on at least one of the three rings A, B or C is hydrogen and each R.sub.p is independently selected from hydrogen, OR.sup.1 and NR.sup.1R.sup.2. G is independently selected from the group consisting of hydrogen, deuterium, and mixtures thereof. Methods of treating textiles with such detergent compositions.