A New Extract and its Utilisation as a Dye, Ink, Stain, Tanning Liquor, and the like.
Year: 1889

page_text: Date of Application, 9th Feb., 1889
Complete Specification Left, 11th Nov., 1889-Accepted, 25th Jan., 1890
PROVISIONAL SPECIFICATION.
A New Extract and its Utilisation as a Dye, Ink, Stain, Tanning
Liquor, and the like.
We EDWARD BRASIER of Bastable House New Cross in the County of Surrey
Engineer and JOHN HAMPDEN KNOWLES of Holderness Road Hull in the County
of York Manufacturer do hereby declare the nature of this invention to be as
follows:-
:-
Our invention has for its object the utilization of the liquor resulting from the
process or processes employed in treating a fibrous plant or material known as
"Bauhinia Vahlü" the extract of which contained in the alkaline water in which
such fibrous material has been boiled we have discovered serves as a dye for dyeing
or staining applicable to a variety of purposes. It may also be used for tanning skins
netting etc. and preparing leather and for use as writing and other inks for writing
and staining purposes.
Dated this 9th day of February 1889.
TONGUE & BIRKBECK,
34, Southampton Buildings, London, W.C., Agents for the Applicants.
COMPLETE SPECIFICATION.
A New Extract and its Utilisation as a Dye, Ink, Stain, Tanning
Liquor, and the like.
We EDWARD BRAISER of Bastable House New Cross in the County of Surrey
Engineer and JOHN HAMPDEN KNOWLES of Holderness Road Hull in the County of
York Manufacturer 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:-
Our invention has for its object the production and utilization of the colouring
matter resulting from the process or processes employed in treating a fibrous plant or
material known as "Bauhinia Vahlü" which colouring matter we have discovered is
contained in such fibrous material and will serve as a dye for dyeing or staining
applicable to a variety of purposes. It may also be used for tanning skins and
netting and for use as writing ink and for staining and other purposes for instance
it may be employed for colouring cement paper pulp and other materials.
The dye or colouring matter is obtained in the following manner :-
The said fibrous material (known as the Bauhinia Vahlü) is boiled or treated with
alkali or an alkaline solution and is thereafter put through rollers or otherwise con-
veniently squeezed whereupon a large quantity of this colouring matter is given
off and is collected in convenient receptacles for use or treatment as herein
explained.
There is also a considerable quantity of this colouring matter in a weak or diluted
state remaining in the solution in which the fibrous material is treated before squeezing
and such colouring matter may also be saved by concentration in any suitable
manner.
We wish it to be distinctly understood that we do not limit ourselves to the above
methods nor in fact to any particular way of obtaining this dye or colouring matter
from the said fibrous materials as it is obvious that such colouring matter may be
obtained from the said fibrous material in inany ways without departing from the
nature of our present invention and discovery.

page_text: The liquid (ie. the colouring matter) may be concentrated by evaporation or diluted
according to the various purposes to which it is to be applied or it may be combined
with other ingredients if required.
Having now particularly described and ascertained the nature of our gaid inven-
tion and in what innnner the same is to be performed we declare that what we
claim is :-
1. The extraction of colouring maiter from the fibrous material Bauhinia Vahlü
substantially as described.
2. The application of the colouring mattor so obtained to dyeing and other kindred
purposes.
TONGUE & BIRKBECK,
84, Southampton Buildings, ('hancery Lane, London, W.C.,
Agents for the Patentees.