Dyeing agent, dyeing solution and method for dyeing strawberry

Details Dyeing agent, dyeing solution and method for dyeing strawberry Dyeing agent, dyeing solution and method for dyeing strawberry

1991-08-15

1993-08-24

Golian, Joseph

Food or edible material: processes, compositions, and products

Products per se, or processes of preparing or treating...

Specific dye or pigment per se or compositions containing same

426250, A23L 1275

Patent

active

052386953

ABSTRACT:
A dyeing agent for dyeing strawberries comprises (a-1) a lac dye; (b) alum; (c) L-ascorbic acid and/or a salt thereof; and (d) a phosphoric acid salt in a weight ratio in an amount of 0.8.about.6.0 parts by weight of component (b), 1.0.about.10.0 parts by weight of component (c) and 2.5.about.23.3 parts by weight of component (d) relative to 1 part by weight of component (a-1), or (a-2) a cochineal dye and a lac dye; (b); (c) and (d) in an amount of 0.8.about.3.6 parts by weight of component (b), 1.0.about.6.0 parts by weight of component (c) and 2.5.about.14 parts by weight of component (d) relative to 1 part by weight of component (a-2). A method for dyeing strawberries comprises the steps of removing the cuticula layer of unripe strawberries, charging the strawberries in a container together with a dyeing solution containing the dyeing agent, degassing the contents of the container, then sealing the container and heating the sealed container. Thereby, it is possible to uniformly dye strawberries approximately natural color of ripe fruits. Thus, strawberries can be dyed in high efficiency through simple processes, i.e., without using a multistage immersion treatment. Moreover, there can be obtained strawberries whose texture is not softened, which are hard and tight and which exhibit favorable taste peculiar to strawberries.

REFERENCES:
patent: 3192055 (1965-06-01), Beerend et al.
patent: 4333957 (1982-06-01), Okajima et al.
patent: 4414234 (1983-11-01), Screennasan et al.

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