New or Improved Colouring Matter or Dye, and Methods of Extracting and Utilizing the same.
Year: 1891

page_text: Date of Application, 3rd July, 1891
Complete Specification Left, 12th Jan., 1892-Accepted, 2nd Apr., 1892
PROVISIONAL SPECIFICATION.
New or Improved Colouring Matter or Dye, and Methods of
Extracting and Utilizing the same.
We, EMILE SCHWEICH and EMILE BUCHER, Ph. D. of Dyar Terrace,
Winnington Park, in the County of Chester, Manufacturing Chemists, do hereby
declare the nature of this invention to be as follows:-
Our invention relates to the extraction and utilisation of the colouring matter
contained in the heartwood of "prosopis " (duleis, juliflora, etcetera) more commonly
called "cashaw tree," which colouring matter we have discovered and which has
not heretofore been utilised.
The cashaw tree grows in large quantities in tropical and the warmer climates,
especially in a zone extending from California to Brazil, and the West Indies; its
wood contains a valuable body which we call "proso pine," belonging to the class
of the indirect colouring matters, giving characteristic dyes when combined with
mordants.
In order to get the valuable body in a suitable form, we cut the wood in small
pieces or we pulverise it; it is then ready for use, oxidised or not, like an ordinary
dyewood. In order to make the extract, we treat the chips or powder of the wood
with any solvent, more especially hot water, with or without pressure, with or
without addition of chemicals.
The weak solutions may be used as such or concentrated by the usual processes.
We wish it to be distinctly understood that we do not limit ourselves to any
particular process of extraction.
The dyeing process is similar to the application of the above mentioned class of
indirect colouring matters; this may be done by mordanting the fibre or any other
material before dyeing, or fixing the colouring matter before the mordants, or,
finally, by putting in the same bath colouring matter, mordants and a weak
solution of any acid. We insist on the fact that we do not confine ourselves to the
mentioned utilisations of the colouring matter discovered by us; it may also be
used for a variety of other purposes, such as printing, staining, etcetera.
We have also found that the described colouring matter is most valuable for
mixing or combining with other compounds or dies, either of vegetable or artificial
source.
Dated this 2nd day of Jul 1901
W. P. THOMPSON & Co.,
Of 6, Lord Street, Liverpool, Patent Agents for the Applicants.
COMPLETE SPECIFICATION.
New or Improved Colouring Matter or Dye, and Methods of
Extracting and Utilizing the same.
We, EMILE SCHWEICH and EMILE BUCHER, Ph. D., Manufacturing Chemists,
of 2 Dyar Terrace, Winnington Park, Northwich, in the County of Chester, 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 :-
We have discovered a new coloring matter which is contained in the heartwood
of the species "prosopis" commonly called "cashaw-tree."
This tree grows generally in the tropical and warmer climates, specially within
a zone extending from California to Brazil and also in the West Indies.

page_text: We call the coloring matter discovered by us "prosopine." It belongs to the
class of the indirect coloring matters and gives characteristic brown dyes when
combined with the usual mordants.
In order to obtain a valuable industrial product we manufacture an extract as
follows: After having removed the bark, the wood is cut into small pieces or
pulverized and then treated with a suitable solvent, more specially hot water, with
or without pressure, with or without addition of chemicals. The weak solutions.
thus obtained may be used as such or concentrated up to any degree by the usual
processes. We wish it to be distinctly understood that we do not limit ourselves
to any particular process of extraction.
The extract thus obtained is valuable also for mixing or combining with other
compounds or dyes, specially tlie indirect dyes.
For instance a deep black is obtained by a mixture of 20% of extract of
prosopine and 80% of extract of logwood, on chrome mordant.
Mixed extracts can be manufactured by mixing the necessary proportions of
the heartwood of the cashaw-tree with other dyewoods and extracting them
together.
The dyeing process is similar to the application of the above mentioned class of
indirect colouring matters; this may be done by mordanting the fibre or any other
material before dyeing, or fixing the colouring matter before the mordants, or,
finally, by putting into the same bath colouring matter, mordants and a weak
solution of any acid.
We insist on the fact that we do not confine ourselves to the mentioned
utilizations of the colouring matter discovered by us; it may also be used for a
variety of other purposes, such as printing, staining, etcetera.
We have also found that the described colouring matter is most valuable for
mixing or combining with other compounds or dyes, either of vegetable or artificial
source. We obtain, for instance, a scale of fancy shades by mixing the prosopine
in suitable proportions with other dyewoods or dyes, such as logwood, fustic and so
on; these shades vary according to the mordants used.
Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is:
1°) The manufacture of a new dyewood extract by extraction of the heartwood
of the species "prosopis "commonly called "cashaw-tree."
2°) The manufacture of dyewood extracts containing an admixture of prosopine
by extraction of the heartwood of the cashaw-tree and other dyewoods.
3°) The utilization of the colouring matter contained in the heartwood of the
cashaw-tree in dyeing or printing, by itself or in connection with other colouring
matters.
11 1003
EMILE SCHWEICH.
EMILE BUCHER, Ph. D.