Whitening of Greek sponges. simple recipes

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FACTORY TECHNOLOGIES AT HOME - SIMPLE RECIPES
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Whitening of Greek sponges. Simple recipes and tips

Factory technologies - simple recipes

Directory / Factory technology at home - simple recipes

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Here are 2 recipes sponge whitening.

1st recipe:

First, well-cleaned sponges are placed in diluted soda lye, left to lie there for a while and then washed well with water. Next, the sponges are washed with diluted sulfuric acid 1 wt. hours of acid per 6 wt. hours of water), until neutralization, i.e. until the release of bubbles stops.

Sponges treated in this way are immersed in a 10% solution of acidic potassium sulphate. In this solution, the sponges remain until they are bleached, after which they are removed and thoroughly washed with water until the flowing water is clear.

1st recipe:

Sponges are treated with a 2% solution of hydrochloric acid, washed well, and then immersed for several hours in a percentage solution of manganese-potassium salt. Next, the sponges are immersed in one two percent solution of hydrochloric acid, to which a small amount of acidic potassium sulfide salt is added.

After 12 hours, the sponges are well squeezed out and washed with water.

Author: Korolev V.A.

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