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(food engineering)
A hot-water or steam direct-scalding treatment of raw foodstuffs of particulate type to inactivate enzymes which otherwise might cause quality deterioration, particularly of flavor, during processing or storage.



(1) In the food-processing industry, blanching is the processing of fruits and vegetables in hot water. This prevents them from darkening and makes the vegetable cells permeable to sugar molecules, which facilitates jam-making. Blanching is also used in the production of raisins and the withering of grapes in the production of sweet and ordinary wines. Blanching for one to three minutes shortens the withering process two to three times.

(2) In the tanning industry blanching is used to remove the residues of subcutaneous cellulose tissues from the lower (flesh side) of skins. After blanching, the surface of the flesh side becomes very smooth, and after dressing and glazing, it becomes lustrous. Skins are also blanched to achieve uniform thickness and to remove defects that cannot be removed by polishing after the application of coatings on the outer side of the skin.

References in periodicals archive ?
But Blanch defended her analysis, contending that the samples presented to court were representative of a larger group of messages that were consistent and indicative.
With extensive experience in Europe and Asia, Blanch is responsible for deploying IMG's services to Al Ruwaya Golf Club at The Tiger Woods Dubai.
While Blanch is an old-fashioned flyer, Tadulala is a brute of a man just as likely to run over the top of an opponent as run round him.
We went so close and to lose by two points is really disappointing," said Blanch, who qualified to play for Ireland because of a grandparent who was born in Belfast, Northern Ireland.
Now Ms Blanch is to stage a public meeting between cat lovers and MPs on Tuesday, August 21, at the Cross and Bowling Green Pub, on the A435 Alcester Road, in Beoley, Worcestershire.
Blanch was open for a merger as it suffered from sagging profitability, lawsuits over its role in the Unicover workers' compensation pool and a drop in stock price.
Archbishop Blanch is one of 12 schools to be rebuilt under Liverpool City Council's PS170m Schools Investment plan, pledged by Mayor Joe Anderson.
Archbishop Blanch will follow the same internal layout of the previous two schools in that classrooms are visible from several points - the whole school can be seen from one particular point and there are no corridors.
To blanch and refresh vegetables, bring a large pot of lightly-salted water to a rolling boil, add the prepared vegetables and cook for a few minutes.
IRELAND winger Damien Blanch is set to make his first Engage Super League appearance for 10 months as Wakefield look to maintain their 100% start to the season at St Helens on Friday.