Year: 1886

page_text: Date of Application, 17th Mar., 1886.
Complete Left, 16th Dec., 1886.
Complete Accepted, 18th Jan., 1887.
I HENRY KERSHAW of Hodge Lane Salford, in the County of Lancaster, Dyer, do
hereby declare the nature of this Invention to be as follows:-
My Invention relates to the Dyeing of cotton and other vegetable fibres and of
goods and yarn made therefrom. According to my invention I obtain fast colours by
treating the goods with certain chemical salts. In the carrying into effect of my said
Invention I dissolve Chromium sulphate and iron peroxide-sulphate in water and to
the solution I add Sodium-bi-carbonate or commercial soda the quantity of alkali used
being such as that precipitation of oxides does not take place. The goods say for
example cotton piece goods are thoroughly saturated with this solution by immersion
or by passing the goods through the solution or by other suitable means and are then
squeezed and dried by means of drying cylinders or are otherwise suitably dried. The
goods are then treated with a weak boiling solution of Silicate of Soda or of Carbonate
of Soda. By these means I obtain greenish grey colours the Silicate of Soda solution
producing greener shades than the carbonate of Soda Solution. I do not confine
myself to the sulphate salts as I may use other salts of Chromium and iron-peroxide
which by the addition of Carbonate or Bi-carbonate of soda form soluble basic salts
or I may use other means to produce the soluble basic salts by re-action upon the
Chromium and iron peroxide salts.
DUTTON & FULTON,
1, St. James Square, Manchester,
Agents.

page_text: Improvements in Dyeing Textile Goods and Materials.
I HENRY KERSHAW of Hodge Lane, Salford in the County of Lancaster, Dyer, do
hereby declare the nature of this Invention and in what manner the same is to be
performed to be particularly described and ascertained in and by the following
statement, that is to say :-
My Invention relates to the Dyeing of cotton and other vegetable fibres and of
goods and yarn made therefrom. According to my invention I obtain fast colours by
treating the goods with certain chemical salts. In the carrying into effect of my said
invention I dissolve Chromium-Sulphate and iron peroxide-sulphate in water and to
the solution I add Sodium-bi-carbonate or commercial soda the quantity of alkali used
being such as that precipitation of oxides does not take place. In practice I have
found the following named proportions to give good results. In about forty five
gallons of water seventy seven pounds of chromium Sulphate and eight and a half
pounds of iron peroxide Sulphate are dissolved. To this solution about thirty six
pounds of Sodium-Bi-Carbonate are added or as much as the solution will take up
without precipitation taking place. The goods say for example cotton piece goods are
thoroughly saturated with this solution by immersion or by passing the goods through
the solution or by other suitable means, and are then squeezed and dried by means of
drying cylinders or are otherwise suitably dried. The goods are then passed into or
through or treated with a weak boiling solution of Silicate of Soda or through a weak
solution of soap the solution used being preferably in a boiling state. By these means
I obtain a drab colour the Silicate of Soda solution producing greener shades than the
soap solution. In place of the latter I may use a weak solution of carbonate of soda
but I prefer the soap solution. I do not confine myself to the Sulphate Salts as I'
may use other salts of chromium and iron-peroxide which by the addition of carbonate
or bi-carbonate of soda form soluble basic salts or I may use other means to produce
the soluble basic salts by re-action upon the chromium and iron and proxide salts.
The proportions hereinbefore mentioned are given by way of example and may be
varied according to the shade of colour which the operator desires to produce.
Having now particularly described and ascertained the nature of the said invention
and in what manner the same is to be performed I declare that what I claim is :-
(1) The production of fast colours from a mixture of iron proxide salts and
chromium salts substantially in the manner and by the means hereinbefore set forth.
(2) The production of fast colours upon fabrics by treating a solution in water of
chromium sulphate and iron peroxide sulphate with sodium bi-carbonate saturating the
goods with this solution drying and then treating the goods with a hot or boiling
solution of silicate of soda soap or carbonate of soda.
DUTTON & FULTON,
1, St. James Square, Manchester,
Agents.