A crystalline pigment or colorant composition having high color intensity and/or low sugar content, and methods and processes of preparation. The composition may comprise purified fruit and/or vegetable color juices.

Disclosed is a method for removing benzo[α]pyrene from a liposoluble natural extract. The method of the present invention comprises adding a suitable solvent to a crude natural extract product so as to obtain a mixed material; heating the mixed material, stirring until uniform, cooling and layering, and then separating the upper layer from the lower layer so as to obtain a precipitate and a filtrate; washing the precipitate with a small amount of a solvent so as to obtain a washed product and a washing solution; removing the solvent from the washed product at a low temperature so as to obtain a finished product; and directly recycling the filtrate and the washing solution as solvents. The present method achieves the purification of the crude natural extract product and the removal of benzo[α]pyrene in one step, and is a novel method which is simple, highly efficient, feasible and easy for industrial applications.

Disclosed is a method for removing benzo[α]pyrene from a liposoluble natural extract. The method of the present invention comprises adding a suitable solvent to a crude natural extract product so as to obtain a mixed material; heating the mixed material, stirring until uniform, cooling and layering, and then separating the upper layer from the lower layer so as to obtain a precipitate and a filtrate; washing the precipitate with a small amount of a solvent so as to obtain a washed product and a washing solution; removing the solvent from the washed product at a low temperature so as to obtain a finished product; and directly recycling the filtrate and the washing solution as solvents. The present method achieves the purification of the crude natural extract product and the removal of benzo[α]pyrene in one step, and is a novel method which is simple, highly efficient, feasible and easy for industrial applications.

Colorant particles are provided which comprise an anthocyanin-based colorant extract from red sweet potato. The mean particle diameter (D.sub.0, 9) of said particles provides good suspension stability. An oil-based colorant composition comprising said particles is provided, as is a food product comprising the oil-based colorant composition.

Colorant particles are provided which comprise an anthocyanin-based colorant extract from red sweet potato. The mean particle diameter (D.sub.0, 9) of said particles provides good suspension stability. An oil-based colorant composition comprising said particles is provided, as is a food product comprising the oil-based colorant composition.

The present invention relates to a food colourant prepared from natural ingredients by heating a mixture comprising 15% w/w to 60% w/w of a source of reducing sugars and 25% w/w to 85% w/w of an amino acid for 1 to 12 hours at 85 to 110 degrees C. The food colourant is of a dark brown to black colour and has a colour intensity of at least 6 at 490 nm. Food products comprising the colourant according to the invention meet the actual needs of consumers and producers in the food industry for natural products. The present invention also relates to a method for preparing the food colourant and to products containing the food colourant.

The present invention relates to a food colourant prepared from natural ingredients by heating a mixture comprising 15% w/w to 60% w/w of a source of reducing sugars and 25% w/w to 85% w/w of an amino acid for 1 to 12 hours at 85 to 110 degrees C. The food colourant is of a dark brown to black colour and has a colour intensity of at least 6 at 490 nm. Food products comprising the colourant according to the invention meet the actual needs of consumers and producers in the food industry for natural products. The present invention also relates to a method for preparing the food colourant and to products containing the food colourant.

The present disclosure relates to a natural dyeing method using fermented persimmon juice, and more particularly to a natural dyeing method using fermented persimmon juice, which prevents the discoloration of a naturally dyed fabric, is harmless to the human body, and exhibits excellent color development, excellent antibacterial activity, excellent deodorization, and excellent dyeing fastness such as friction fastness and light fastness.

The present disclosure relates to a natural dyeing method using fermented persimmon juice, and more particularly to a natural dyeing method using fermented persimmon juice, which prevents the discoloration of a naturally dyed fabric, is harmless to the human body, and exhibits excellent color development, excellent antibacterial activity, excellent deodorization, and excellent dyeing fastness such as friction fastness and light fastness.

The present disclosure relates to a natural dyeing method using shouliang yam rhizome, and more particularly to a natural dyeing method using shouliang yam rhizome, which prevents the discoloration of a naturally dyed fabric, is harmless to the human body, and exhibits excellent color development, excellent antibacterial activity, excellent deodorization, and excellent dyeing fastness such as friction fastness and light fastness.