Improvements in the Manufacture of Textile Fabrics having Two Coloured and Crape Effects.
Year: 1898

page_text: PROVIDIUNAL DITOITICATION.
Improvements in the Manufacture of Textile Fabrics having Two
Coloured and Crape Effects.
I, SYDNEY PITT, of Sutton, in the County of Surrey, Gentleman, do hereby
declare the nature of this invention (which has been communicated to me from
abroad by Leopold Cassella & Company, of Frankfort on Main, in the Empire
of Germany,) to be as follows:-
Until recently different coloured effects on woollen piece goods have been pro-
duced by the simple method of weaving together differently coloured yarns.
Of late similar effects have also been obtained by weaving wool mordanted with
metallic salts (for instance chromates) together with unmordanted wool and then
dyeing the resulting tissue.
My foreign correspondents have now discovered a method which in a simple
manner gives much better results and at the same time allows of the production
of special weaving effects.
This method consists in weaving chlored wool together with unchlored wool.
Chlored wool absorbing more dyestuff than unchlored wool, two coloured effects
are produced in the dyebath on goods composed as above.
By this method also tissues may be produced which, when dyed or milled, will
show effects similar to the so-called crape or crimping effects and even more perfect
than such produced hitherto. These effects may still further be increased by using
for the chloring process hard qualities of wool, which will contract less, and
weaving them together with soft qualities of wool.
In the practical application of this method strongly chlored wool, either in the
raw state or in the shape of yarn, bobbins or sliver, is woven together in any
desired manner with wool scoured as usual. The goods are then dyed with acid
or diamine colours. The latter are especially suitable for producing contrasting
effects as they will dye chlored wool deep and intense shades, and scarcely stain
unchlored wool.
For goods which are to be milled it is advisable to use acid baths for milling
instead of alkaline ones in order to improve the two-coloured effect, whilst the crape
effects are not influenced by acid or alkaline milling.
Cotton or silk threads may be interwoven in order to obtain a still greater variety
of effects.
Tissues composed of the differently prepared wools may be subsequently printed,
raised or milled, which processes likewise produce new effects of the kind described,
resulting from the different properties of the chlored and unchlored wools.
Dated this 30th day of June 1898.

page_text: Improvements in the Manufacture of Textile Fabrics having Two
Coloured and Crape Effects,
I, SYDNEY PITT, of Sutton, in the County of Surrey, Gentleman, do hereby
declare the nature of this invention (which has been communicated to me from
abroad by Leopold Cassella & Company, of Frankfort-on-Main, in the Empire
of Germany,) and in what manner the same is to be performed to be particularly
described and ascertained in and by the following statement:—
Until recently different coloured effects on woollen piece goods have been pro-
duced by the simple method of weaving together differently coloured yarns.
Of late similar effects have also been obtained by weaving wool mordanted with
metallic salts (for instance chromates) together with unmordanted wool and then
dyeing the resulting fabric.
My foreign correspondents have now discovered a method which in a simple
manner gives much better results and at the same time allows of the production
of special weaving effects.
This method consists in weaving chlored wool together with unchlored wool.
Chlored wool absorbing more dyestuff than unchlored wool, two coloured effects
are produced in the dyebath on goods composed as above.
By this method also fabrics may be produced which, when dyed or milled, will
show effects similar to the so-called crape or crimping effects and even more perfect
than such produced hitherto. These effects may still further be increased by using
for the chloring process hard qualities of wool, which will contract less, and
weaving them together with soft qualities of wool.
In the practical application of this method wool strongly chlored, either in the
raw state or in the shape of yarn, bobbins or sliver, is woven together in any
desired manner with wool scoured as usual. The goods are then dyed with acid
or diamine colours. The latter are especially suitable for producing contrasting
effects as they will dye chlored wool deep and intense shades, and scarcely stain
unchlored wool.
For goods which are to be milled it is advisable to use acid baths for milling
instead of alkaline ones in order to improve the two-coloured effect, whilst the crape
effects are not influenced by acid or alkaline milling.
Cotton or silk threads may be interwoven in order to obtain a still greater variety
of effects.
Fabrics composed of the differently prepared wools may be subsequently printed,
raised or milled, which processes likewise produce new effects of the kind described,
resulting from the different properties of the chlored and unchlored wools.
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:
1. The production of two-coloured effects on woollen piece goods, by weaving
together chlored and unchlored wool and dyeing the thus obtained fabrics sub-
stantially as described.
2. The production of crape-effects on woollen piece goods by treating fabrics
composed of chlored and unchlored wool with acids or alkalis substantially as
described.
T