An Improved Process for Dyeing. Piece Goods.
Year: 1892

page_text: Date of Application, 14th Mar. 1892
Complete Specification Left. 5th Dec., 1892-Accepted, 14th Jan., 1893
PROVISIONAL SPECIFICATION.
An Improved Process for Dyeing. Piece Goods.
I, ERNST ZILLESSEN Senr. of Crefeld Germany do hereby declare the nature
of this invention to be as follows :-
My invention relates to an improved process for dyeing piece goods whereby
woven fabrics of silk, wool, cotton, tussah, China grass, ramie and the like have
one part of their threads so prepared before weaving that in the subsequent process
of piece dyeing, the prepared threads are caused to assume a different color from,
or are differently affected than the other non-prepared threads.
In the following I will describe such process for silk, wool and cotton.
The preparation of the silk threads before weaving consists in treating the same
with a metallic salt, and afterwards fixing the metallic oxide on the fibre. On
afterwards dyeing in the piece, those dye solutions are chosen which dye the
prepared threads but leave the unprepared threads undyed. As an example of this
process may be described the preparation of the silk with ferric oxide and dyeing
in the piece with logwood.
The silk to be prepared is treated for a short time in a 10 degree solution of
ferric oxide-sulphate, and is then washed and dried.
By this means ferric oxide is fixed on the fibre. If the silk thus prepared be
woven together with raw unprepared silk, and the fabric be then treated with a
hot solution of logwood extract (10 grammes to the litre) the silk prepared with
the ferric oxide will be dyed black, while the non-prepared silk will remain
white.
By employing in like manner various other kinds of metallic oxides, and different
kinds of dye solutions a great variety of colour effects can be produced.
The application of the process to wool and cotton is as follows.
The wool to be treated is impregnated with a metallic oxide; thus chromium-
oxide is fixed on the fibre by boiling the wool for an hour in 3 per cent. bichromate
of potass and 1 per cent. sulphuric acid, then washing and drying
On cotton a metallic oxide is in like manner fixed, for example ferric oxide, by
treating the cotton in a 5 degree solution of ferric oxide sulphate, the solution
being then wrung out, the cotton passed through weak soda lye, then washing and
drying.
The cotton thus prepared is then woven together with unprepared cotton, and the
fabric is treated with a hot solution of logwood, whereupon the prepared fibre will
become black while the unprepared fibre remains white.
By using a variety of other metallic oxides and various colour solutions, a great
variety of colour combinations can be produced.
The various other fibres herein before mentioned are treated in an analogous
manner.
Dated this 14th day of March 1892.
ABEL & IMKA1,
Agents for the Applicant.

page_text: An Improved Process for Dyeing Piece Goods.
I, ERNST ZILLESSEN Senr. of Crefeld, Germany 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 :-
My invention relates to an improved process for dyeing piece goods whereby
woven fabrics of wool, cotton, tussah, China grass, ramie and the like have one
part of their threads so prepared before weaving that, in the subsequent process of
piece dyeing, the prepared threads are caused to assume a different color from, or
are differently affected than the other non-prepared threads.
In the following I will describe such process for wool and cotton.
The wool to be treated is impregnated with a metallic oxide, thus chromium-
oxide is fixed on the fibre by boiling the wool for an hour in 3 per cent. bichromate
of potash and 1 per cent. sulphuric acid, then washing and drying.
Ôn cotton, a metallic oxide is in like manner fixed, for example ferric oxide, by
treating the cotton in a 5 degree solution of ferric oxide sulphate, the solution
being then wrung out, the cotton passed through weak soda lye, then washing and
drying.
The wool or cotton thus prepared is then woven together with unprepard wool
or cotton, and the fabric is treated with a hot solution of logwood, whereupon the
prepared fibre will become black while the unprepared fibre remains white.
By using a variety of other metallic oxides and various color solutions, a great
variety of color combinations can be produced.
The various other fibres hereinbefore mentioned are treated in an analogous
manner.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :
The process for dyeing piece goods so as to obtain a variety of patterns, by
treating one portion of the wool, cotton, tussah, China grass, ramie and the like
fibres before weaving with a metallic mordant, and then after weaving it together
with another portion of the said fibre which has not been so treated, subjecting
the fabric to the ordinary dyeing process, substantially as described.
Dated this 30th day of November 1892.
2
3
ABEL & IMRAY,
Agents for the Applicant.