IMPROVEMENTS IN THE TREATMENT OF SILK FOR LOADING IT PREVIOUSLY TO DYEING
Year: 1882

page_text: LETTERS PATENT to Gerard Wenzeslaus von Nawrocki, Proprietor of the firm
of J. Brandt & G. W v. Nawrocki, Patent Solicitor and Civil Engineer of
124 Leipzigerstrasse, Berlin Germany for an Invention of "IMPROVEMENTS
IN THE TREATMENT OF SILK FOR LOADING IT PREVIOUSLY TO DYEING
"
a communication from William Meister of the City of New York in the
United States of America
PROVISIONAL SPECIFICATION left by the said Gerard Wenzeslaus von
Nawrocki at the Office of the Commissioners of Patents on the 7th December
1882.
GERARD WENZESLAUS VON NAWROCKI, Proprietor of the firm of J. Brandt
& G. Wv Nawrocki, Patent Solicitor and Civil Engineer of 124 Leipzigerstrasse
Berlin Germany
"IMPROVEMENTS IN THE TREATMENT OF SILK FOR LOADING IT.
PREVIOUSLY TO DYEING (A Communication from William Meister of the City
of New York in the United States of America)
"
The silk to be treated is boiled slightly, wrung out, washed and revived with
sulphuric acid and washed and wrung out again. Then the silk is put into a
solution of chloride of tin of 35° Beauiné and allowed to remain there quietly for
half an hour. This chloride of tin solution is made by taking 100 parts of pure
salt of tin (Sn Cl₂ + 2 H, O) dissolved in 387 parts 20° muriatic acid as free from
iron as possible and 35 parts of chlorate of Kalium (K, CI O,) are then slowly and
carefully added. The liquid is let off or filtered off and yields the chloride of tin
for treating the silk
The silk so treated is then wrung out, well washed, again wrung out, and then
brought into a solution of strongly concentrated soda solution of 45° Centigrade. The
silk is drawn round the bath about 8 times, then wrung out, washed and wrung out
again. Then the treatment of the silk with the chloride of tin is begun as before
Each time that the
and repeated until the desired weight of the silk is attained.
silk is dipped into the chloride of tin and the thereupon following soda bath, it
gains from 12 to 13 per cent,, without taking into consideration the original
strength of the chloride of tin bath
When the desired weight is attained the loaded silk coming warm from the
soda bath is put into a boiled soap lye drawn round in it for about 10 times,
wrung out, washed, and again wrung out. After that the silk is ready to be dyed
as desired.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Gerard Wenzeslaus von Nawrocki in the Great Seal Patent
Office on the 7th June 1883.
GERARD WENZESLAUS VON NAWROCKI, Proprietor of the firm of J. Brandt
& G. Wv Nawrocki, Patent Solicitor and Civil Engineer of 124 Leipzigerstrasse
Berlin Germany "IMPROVEMENTS IN THE TREATMENT OF SILK FOR LOADING IT
PREVIOUSLY TO DYEING (A Communication from William Meister of the City
of New York.in the United States of America)
"
The silk to be treated is boiled slightly wrung out, washed and revived with
sulphuric acid and washed and wrung out again. Then the silk is put into a
solution of chloride of tin of 35° Beaumé and allowed to remain there quietly for
half an hour. This chloride of tin solution is made by taking 100 parts of pure
salt of tin (Sn Cl, +2 H, O) dissolved in 387 parts 20° Muriatic acid as free from
iron as possible and 35 parts of chlorate of Kalium (K. Cl. O,) are then slowly and
carefully added. The liquid is let off or filtered off, and yields the chloride of tin
for treating the silk. The silk so treated is then wrung out, well washed, again
wrung out, and then brought into a solution of strongly concentrated soda of
45 centigrade. The silk is drawn round the bath about 8 times, then wrung out,
washed and wrung out again. Then the treatment of the silk with the chloride
of tin is begun as before and repeated until the desired weight of the silk is
attained. Each time that the silk is dipped into the chloride of tin and the
thereupon following soda bath, it gains from 12 to 13 per cent; without taking
into consideration the original strength of the chloride of tin bath.
When the desired weight is attained the loaded silk, coming warm from the soda
bath, is put into a boiled soap-lye drawn round in it for about 10 times, wrung
out, washed and again wrung out. After that the silk is ready to be dyed as
desired.
Having now described the nature of the said Invention and in what manner
the same is to be performed I declare that I claim as the invention communicated
to me:-
The described process for loading silk previous to dyeing it, consisting in dipping
it. into baths of chloride of tin and of soda several times and afterwards into one
of boiled soap lye substantially as set forth.
In Witness whereof I the said Gerard Wenzeslaus von Nawrocki have hereunto
set my hand and seal this Second day of June in the year of our Lord One
thousand eight hundred and eightythree.
CEDADD UENZETTIN
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