35 results about "Cochineal red" patented technology

The invention discloses a treatment process of dyeing preserved strawberries with cochineal red pigment. The process comprises the following steps:1, boiling strawberries, that is, boiling strawberries in boiling liquid which is obtained by adding sodium pyrosulfite and sodium chloride in water, wherein, the content of sulfur in the boiling liquid is 200 to 500 ppm, the concentration of sodium chloride is between 5 to 10 g / L; 2, preparing pigment water, that is, adding cochineal red pigment and sodium chloride into water and carrying out stirring for even mixing, wherein, the concentration of cochineal red pigment is 0.3 g / L, and the concentration of sodium chloride is 5 to 10 g / L; 3, dyeing strawberries, that is, dyeing boiled strawberries in the pigment water for 24 hours, wherein, temperature for dyeing at first 12 hours is 65 to 90 DEG C, and temperature for dyeing at second 12 hours is 50 to 75 DEG C; 4, infiltrating sugar, that is, carrying out sugar infiltration on dyed strawberries; 5, finishing a product, that is, carrying out baking and soft tempering on strawberries after sugar infiltration. The process provided in the invention effectively overcomes the defects that cochineal red pigment is difficult to paint, makes painting uneven and has a color not brilliant enough, and enables uniformly colored and brilliant preserved strawberries by using cochineal red pigment to be obtained.

The invention discloses a drawing pigment specially used for opera murals and a preparation method thereof. The drawing pigment is prepared from the following raw materials in parts by weight: 20-25 parts of annatto, 15-18 parts of lac red, and 2-3 parts of talcum powder 3-4 parts of polysorbate, 6-7 parts of polyvinyl alcohol, 2-6 parts of hydroxymethyl cellulose, 7-8 parts of methyl pentanol, 2-4 parts of silica powder, polytetrafluoroethylene 3-5 parts of powder, 50-80 parts of deionized water; the steps of the preparation method of the drawing pigment are: stirring the prepared raw materials to obtain a mixed solution, grinding the mixed solution, and screening the ground mixed solution to obtain a special color for opera murals Drawing pigments; by adding polytetrafluoroethylene powder and silica powder to the raw materials for the preparation of pigments, the wear resistance and high temperature resistance of the mural are improved. By controlling the rotation of the grinding tank and the grinding disc in the opposite direction, the To improve the grinding effect, the grinding mechanism can freely adjust the height of the grinding disc to control the grinding degree.

The invention belongs to the technical field of natural pigments, and relates to a color-protecting agent and method for improving thermal stability of cochineal dye. The color-protecting agent is prepared from the following raw materials, in parts by mass: 0.1-0.4 part of tea polyphenols, 0.02-0.05 part of papaya flavone, and 0.5-1.5 parts of glucomannan; the color-protecting agent is prepared bydispersing the raw materials into a mixed solvent; and the above color-protecting agent is added into the cochineal dye, and uniform mixing is performed to form a mixture of the cochineal dye and thecolor-protecting agent. According to the color-protecting agent and method for improving the thermal stability of the cochineal dye provided by the invention, the thermal stability of the cochineal dye can be effectively improved, and discoloration of the cochineal dye due to heat during processing and storage of the cochineal dye can be avoided; and meanwhile the tea polyphenol and papaya flavone antioxidants are slowly released under the action of the glucomannan, so that the effect effective duration of the color-protecting agent can be effectively prolonged.