How to make glass etching cream?

I want to know how to make white glass etching cream for frosting the glass. I have already bought the white powder (dudhi) and hydrofluoric acid and

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Armour Etch Glass Etching Cream, 22 oz.

Armour Etch Glass Etching Cream, 2.8 oz (Canadian) – RQC Supply Ltd

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Glass Etching Secrets Cream by Armour Etch: 10 oz