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FAQ - Where can we get sulfuric acid?

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Sulfuric acid is usually available inexpensive.

Remember: You need about 12-19% sulfuric acid concentration. Battery acid concentration is 38%, so you can mix it 1:2 to 1:1 with distilled water to stretch and therefore you require correspondingly less sulfuric acid!

And again the warning:

Sulfuric acid is highly corrosive and can cause serious eye injuries. Use gloves, protection googles and old clothes when handling it! It is also advantageous if you place a bucket of tap water and a sponge near of you when working with acid to wash affected areas of the body immediately in case of emergency.
Remember also that sulfuric acid warms massively on when mixed with water. So stir the acid slowly in cold water, never vice versa!