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A Gelatine Mould For Casting Plaster Ornaments

Allow twelve ounces of

Gelatine to soak for a few hours in water, until it has absorbed as

much as it can, then apply heat, by which it will liquify. If the mould

is required to be elastic, add three ounces of Treacle, and mix well

with the Gelatine. If a little Chrome Alum (precise proportions are

immaterial) be added to the Gelatine, it causes it to lose its property

of being again dissolved in water. A saturated solution of Bichromate

of Potash brushed over the surface of the mould, allowed to become dry

and afterwards exposed to sunlight for a few minutes, renders the

surface so hard as to be unaffected by moisture.