Color protection method for unripe chestnut

A chestnut and color protection technology, which is applied in food preparation, pod removal, shelling, etc., can solve the problems of increasing the difficulty of peeling operations and hardening of the inner skin, and achieve the effects of shortening the color protection treatment time, promoting softening, and bright colors

Inactive Publication Date: 2012-10-03
天津天康源生物技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

In addition, if soaked for a long time in the liquid medicine at a temperature lower than 40°C, the inner skin will be completely hardened, which will increase the difficulty of peeling.

Method used

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  • Color protection method for unripe chestnut
  • Color protection method for unripe chestnut
  • Color protection method for unripe chestnut

Examples

Experimental program
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Embodiment Construction

[0033] figure 1 It is the operating procedure flowchart of the method for protecting the color of raw chestnuts of the embodiment. The method for protecting the color of raw chestnuts according to this embodiment is mainly composed of the process of peeling off the endothelium (step S1 and step S2) and the process of color protection (step S3) as pretreatment.

[0034] First, the step of peeling off the inner skin (step S1 and step S2) will be described.

[0035] Since the peeling of the inner skin is carried out with an aqueous sodium hydroxide solution under specific conditions, the inner skin peeling process related to this embodiment consists of the peeling of the inner skin and the saccharification of the pulp.

[0036] In the stripping process of the endothelium, while removing the outer skin by hand or medicinal solution, it is necessary to prepare an aqueous solution of sodium hydroxide (hereinafter referred to as medicinal solution) with a concentration of 2.5 to 5% ...

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Abstract

The invention discloses a color protection method for unripe chestnut. According to the technical scheme, the color protection method for unripe chestnut includes soaking the unripe chestnut with inner husk removed in ascorbic acid solution at 80-90 DEG C for 1-2 minutes, wherein the mass percent concentration of the ascorbic acid solution is 0.5-5%. By the color protection method, pulp of the unripe chestnut with outer husk and inner husk removed is in bright yellow the same as or better than that obtained by coloring with gardenia yellow pigment solution.

Description

technical field [0001] The invention relates to the field of food processing, in particular to a method for protecting the color of raw chestnuts. Background technique [0002] Raw chestnuts that have been stripped of their inner skins are whitish and unattractive, so they are soaked in gardenia yellow for about one night and colored to turn the flesh into a bright yellow. But the problem is that the listing operation of raw chestnuts will take a lot of time. [0003] In pastry making, when chestnuts are used to cook nectar, it is necessary to peel off the chestnut skin and inner skin together. The phenolic compound tannin is contained in the chestnut inner skin, which has the function of connecting the inner skin and the pulp. Because this inner skin is densely distributed on the surface of the pulp, when removing it by hand, a part of the pulp is also removed. The pulp yield that this method obtains declines. As a result, the commercial value of chestnuts will be signi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A23L1/36A23N5/08A23L25/00
Inventor 郑慧英
Owner 天津天康源生物技术有限公司
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