Natural complex brown pigment preparation and application thereof
A brown pigment, natural technology, applied in the field of natural compound brown pigment preparations, can solve carcinogenicity and other problems
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Embodiment 1
[0020] Example 1, the liquid chestnut shell pigment with a red index of 6.07 and a color rate of 10632 and the powder monascus red pigment with a color value of 120 are mixed and stirred evenly in a ratio of 35:1 by weight to obtain final product.
Embodiment 2
[0021] Example 2, the liquid chestnut shell pigment with a red index of 6.49 and a color rate of 9605 and the powder monascus red pigment with a color value of 100 are mixed and stirred evenly in a ratio of 40:1 by weight to obtain final product.
Embodiment 3
[0022] Example 3, the liquid chestnut shell pigment with a red index of 6.31 and a color rate of 9473 and the powder monascus red pigment with a color value of 110 are mixed and stirred evenly in a ratio of 30:1 by weight to obtain final product.
[0023] The liquid chestnut shell pigment used in Examples 1-3 is obtained by the following method: (1) the crude extract of chestnut shell is successively filtered by disc centrifugation and diatomaceous earth to obtain the filtrate; (2) the filtrate volume is added successively to the filtrate %—5% citric acid and 0.1% NaCl, stir well, let it stand for 10 hours, filter, and collect the precipitate; (3) Dissolve the precipitate with ethanol, methanol or n-butanol with a volume fraction of 5—10 times and a volume fraction of 30—50%. , filtered, and the filtrate was vacuum-concentrated at 50-65°C to 1 / 8-1 / 5 volume, and obtained after recovering ethanol, methanol or n-butanol.
[0024] The preparation method of the above-mentioned ches...
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