IMPROVEMENTS IN DYEING 86 AND PRINTING TEXTILE FABRICS
Year: 1872

page_text: LETTERS PATENT to Charles Dreyfus, of Radcliffe, in the County of
Lancaster, Chemist, for the Invention of IMPROVEMENTS IN DYEING
86
AND PRINTING TEXTILE FABRICS."
Sealed the 28th January 1873, and dated the 30th July 1872.
the
PROVISIONAL SPECIFICATION left by the said Charles Dreyfus at the.
Office of the Commissioners of Patents, with his Petition, on
30th July 1872.
I, CHARLES DREYFUS, of Radcliffe, in the County of Lancaster,
Chemist, do hereby declare the nature of the said Invention for “Improve-
MENTS IN DYEING AND PRINTING TEXTILE FABRICS," to be as follows:-
This Invention consists in the production of fast colors, such as brown,
slate, chocolate, black, salmon, and other mixed shades-on textile fabrics.
by printing or staining them with metallic acetates or other metallic
solutions, commonly called mordants, either separately or mixed, according
to the color required, ageing and dunging by the usual process or pro-
cesses known. I then dye the goods in a beck containing, besides the
usual supply of water, a quantity of mahogany wood, averaging from
four to ten pounds per piece of goods, according to the pattern and
depth of shade required.
.
I also, instead of using the mahogany wood, employ its extract, pro-
duced by any suitable means.

page_text: .
In some cases, instead of using the mahogany wood or its extract alone,
I find it desirable for certain special shades or colors to mix with it other
dye stuffs, or dye woods, such as madder or its derivates, Persian berries,
peachwood, logwood, sumac, bark, or their extracts, aniline dyes, or
other dyes derived from coal tar.
For printing I use the extract of mahogany, either alone or mixed
with the extracts of the dye stuffs before named, suitably thickened with
the amount of mordant required for the goods under operation; steam
and wash as usual.
Some of the dye stuffs above named, which do not produce fast shades
if used by themselves, are rendered so if dyed with mahogany or its
extracts, such, for instance, as Persian berries.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Charles Dreyfus in the Great Seal Patent Office on
the 30th January 1873.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, CHARLES
DREYFUS, of Ratcliffe, in the County of Lancaster, Chemist, send
greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Thirtieth day of July, in the year
of our Lord One thousand eight hundred and seventy-two, in the thirty-
sixth year of Her reign, did, for Herself, Her heirs and successors, give
and grant unto me, the said Charles Dreyfus, Her special license that I,
the said Charles Dreyfus, my executors, administrators, and assigns, or
such others as I, the said Charles Dreyfus, my executors, administrators,
and assigns, should at any time agree with, and no others, from time
to time and at all times thereafter during the term therein expressed,
should and lawfully might make, use, exercise, and vend, within the
United Kingdom of Great Britain and Ireland, the Channel Islands,
and Isle of Man, an Invention for "IMPROVEMENTS IN DYEING AND PRINTING
TEXTILE FABRICS," upon the condition (amongst others) that I, the said
Charles Dreyfus, my executors or administrators, by an instrument in
writing under my, or their, or one of their hands and scals, should par-
ticularly describe and ascertain the nature of the said Invention, and in
what manner the same was to be performed, and cause the same to be

page_text: filed in the Great Seal Patent Office within six calendar months next
and immediately after the date of the said Letters Patent.
NOW KNOW YE, that I, the said Charles Dreyfus, do hereby declare
the nature of my said Invention, and in what manner the same is to
be performed, to be particularly described and ascertained in and by
the following statement (that is to say) :-
This Invention consists in the production of fast colors, such as brown,
slate, chocalate, black, salmon, and other mixed shades on textile fabrics
by printing or staining them with metallic acetates, or other metallic
solutions, commonly called mordants, either separately or mixed, according.
to the color required, ageing and dunging by the usual process or
processes known. I then dye the goods in a beck containing, besides
the usual supply of water, a quantity of mahogany wood, averaging
from four to ten pounds per piece of goods, according to the pattern and
depth of shade required.
I also, instead of using the mahogany wood, employ its extract, pro-.
duced by the usual means of boiling the wood with water.
In some cases, instead of using the mahogany wood or its extract
alone, I find it desirable for certain special shades or colors to mix with,
it other dye stuffs or dye woods, such as madder or its derivates (garan-
cine, alizarine), Persian berries, peachwood, logwood, sumac, bark, bar-
wood, or their extracts, aniline dyes, or other dyes derived from coal tar.
For printing I use the extract of mahogany, either alone or mixed
with the extracts of the dye stuffs before named, suitably thickened with
the amount of mordant required for the shade to produce; steam and
wash as usual.
Some of the dye stuffs above named, which do not produce fast shades
if used by themselves, are rendered so if dyed with mahogany or its
extracts, such, for instance, as Persian berries.
To carry my Invention into practice I proceed as follows:-To produce
a brown, for example, I print or stain the cloth with acetate of alumina,
commonly called red liquor: I then age and dung the same way as for
making a madder red, which operations are well known in calico printing.
I then dye in mahogany wood three to ten pounds per piece, or an
equivalent quantity of mahogany extract.

page_text: The dyeing is made as follows:-To the usual quantity of water I add
the mahogany wood or extract with five to ten per cent. of its weight of
chalk, and a small quantity of glue size. I dye up to the boiling point
in from half to one hour, and I keep it boiling till the depth of shade
required. is produced. I then take the goods out of the dye beck, wash
them well, and clear them through a weak solution of chloride of lime,
commonly called chemic, till the whites are pure.
In using a tin mordant instead of an alumina mordant the shade of
brown is yellower; a mixture of tin and alumina mordants gives a nice
soft shade of brown. The chocalate is produced by a mixture of iron
and alumina mordants; slates are obtained with a weak iron mordant or
an uranium mordant. The dyeing is made the same way as for
brown.
Having thus described the nature of my Invention, and the manner
of carrying the same into practical effect, I wish it to be understood.
that what I claim as being my Invention is,―
First. The dyeing or printing of textile fabrics, printed or stained
with suitable mordants, with mahogany wood, or extract of mahogany
wood, either separately or mixed with various quantities of other dye stuffs
or dye woods, or their extracts.
Secondly. The making of an extract from the mahogany wood by
boiling the same with water.
In witness whereof, I, the said Charles Dreyfus, have hereunto set
my hand and seal, this Twenty-eighth day of January, in the year
of our Lord One thousand eight hundred and seventy-three.
Signed, sealed, and delivered by the
within-named Charles Dreyfus, in
the presence of
G. SEPTIMUS HUGHES,
Patent Agent,
CHARLES DREYFUS. (L.S.)
Manchester.