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Glue for Paper and Metal:-
Glue which will keep
well and adhere tightly is obtained by diluting 1,000 parts by weight of
potato starch in 1,200
parts by weight of water and adding 50 parts by
weight of pure nitric acid. The mixture is kept in a hot place for
48 hours,
taking care to stir frequently. It is afterwards boiled to thick and
transparent consistencies diluted with
water if there is occasion and then
there are added in the form of a screened powder, 2 parts of Sal ammoniac
and I
part of sulphur flowers.
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