Improvements in Bleaching Cotton, Linen and other Vegetable Textile Materials.
Year: 1897

page_text: PROVISIONAL DIMUIFICATION.
Improvements in Bleaching Cotton, Linen and other Vegetable
Textile Materials.
I, CARLOS DELESCLUSE, of Marommes, near Rouen, France, Manufacturer, do
hereby declare the nature of this invention to be as follows:-
This invention relates to the bleaching of vegetable textile materials in such
a manner as to dispense with the ordinary preliminary treatment in an alkaline
or soap bath which has the effect of weakening the fibre and giving it an earthy
and yellowish appearance. Moreover after fibres so treated have been bleached
by chlorine, it is impossible to clear them completely of the chlorine, and conse-
quently the textures cannot be finely or uniformly dyed, and are weakened. The
present invention relates to means of obviating these evils by chemical treatment
and special stretching and drying operations.
The chemical treatment consists in adding to the ordinary chlorine bath દી
solution composed of about 2.5 kilos of molasses, 2.5 kilos of starch
and 10 kilos of nitric acid of 360 Bé., these substances being mixed
cold and heated on the water bath, and the mixture being diluted
with water till its density is about 1° Bé. This forms the bath in which are
immersed bobbins holding skeins of the textile material through which the
liquid is drawn or forced. After this treatment chlorine effects complete bleach-
ing without affecting the strength of the fibres or their downy feel. The molasses
and starch of the mixture serve as vehicle for the bleaching agents reducing their
corrosive action.
The skeins when bleached are gradually stretched and in this condition steamed
and dried by strong air currents. Cotton treated as above described can be blued
and dyed in the same apparatus as that employed for the bleaching treatment.
Dated this 20th day of November 1897.
ABEL & IMRAY,
Agents for the Applicant.
Improvements in Bleaching Cotton, Linen and other Vegetable
Textile Materials.
I, CARLOS DELESCLUSE, of Marommes, near Rouen, France, Manufacturer, do
ereby declare the nature of this invention and in what manner the same is to
Price 8d1

page_text: be performed, to be particularly described and ascertained in and by the follow-
ing statement:.
-
This invention relates to the bleaching of vegetable textile materials in such
a manner as to dispense with, the ordinary preliminary treatment in an alkaline
or soap bath which has the effect of weakening the fibre and giving it an earthy
and yellowish appearance. Moreover after fibres so treated have been bleached
by chlorine, it is impossible to clear them completely of the chlorine, and con-
sequently the textures cannot be finely or uniformly dyed, and are weakened.
The present invention relates to means of obviating these evils by chemical
treatment and special stretching and drying operations.
The chemical treatment consists in adding to the ordinary chlorine bath a
solution composed of about 2.5 kilos of molosses, 2.5 kilos of starch and 10 kilos
of nitric acid of 36° Bé, these substances being mixed cold and heated on the
water bath, and the mixture being diluted with water till its density is about
1° Bé. This forms the bath in which are immersed bobbins holding skeins of
the textile material through which the liquid is drawn or forced. After this
treatment chlorine effects complete bleaching without affecting the strength of
the fibres or their downy feel. The molasses and starch of the mixture serve
as vehicle for the bleaching agents reducing their corrosive action.
The skeins of bleached material are taken from the round boxes in which they
had been treated with chlorine and are gradually stretched on suitable reels,
and while held on the stretch, are exposed to steam and then dried by strong air
currents. Cotton treated as above described can be blued and dyed in the same
vat as that employed for the bleaching treatment.
Having now particularly described and ascertained the nature of this
invention and in what manner the same is to be performed, I declare that what I
claim is:-
1. For bleaching vegetable textile materials instead of the usual preliminary
treatment with alkali, a treatment with a chlorine bath having added to it a
solution consisting of molasses, starch and nitric acid, substantially as described.
2. Bluing or dyeing in the same vat in which the material is treated as above
set forth, thus avoiding intermediate manipulation.
3. Subjecting the bleached material to stretching by suitable reels before
steaming and drying.
Dated this 30th day of December 1897.
ABEL & IMRAY.
Agents for the Applicant.