A NEW MANUFACTURE OF A CERTAIN COLORING MATTER TO BE USED IN THE DYEING OR IS THE PRINTING OF WOOLLEN, COTTON SILK, AND OTHER FABRICS
Year: 1847

page_text: TO ALL TO WHOM THESE PRESENTS SHALL COME, I, CLEMENCE
AUGUSTUS KURTZ, of Manchester, in the County of Lancaster, Manufacturing
Chemist, send greeting.
WHEREAS Her present most Excellent Majesty Queen Victoria, by Her
Letters Patent under the Great Seal of the United Kingdom of Great Britain
and Ireland, bearing date at Westminster, the Twenty-sixth day of January,
One thousand eight hundred and forty-seven, and now last past, did, for
Herself, Her heirs and successors, give and grant unto me, the said Clemence
Augustus Kurtz, my exors, admors and assigns, Her especial license, that I,
the said Clemenice Augustus Kurtz, my exors, admiors, and assigns, or such
others.as I, the said Clemence Augustus Kurtz, my exors, admors, or assigns,
should at any time agree with; and no others, from time to time and at all
times during the term of years therein expressed, should and lawfully make,
use, exercise, and vend, within England; Wales, and the Town of Berwick-
upon-Tweed, and in all Her Majesty's Colonies and Plantations abroad, my
Invention of "A NEW MANUFACTURE OF A CERTAIN COLORING MATTER TO BE USED
IN THE DYEING OR IS THE PRINTING OF WOOLLEN, COTTON, SILK, AND OTHER
FABRICS" in which said Letters Patent is contained a proviso, obliging me,
the said Clemence Augustus Kurtz, by an instrument in writing under my
hand and seal, particularly to describe and ascertain the nature of my said
Intention, and in what manner the same is to be performed, and to cause the
same to be enrolled in Her Majesty's High Court of Chancery within six
calendar months next and immediately after the date of the said recited Letters

page_text: Patent, as in and by the said Letters Patent, reference being thereunto had,
will more fully and at large appear.
NOW KNOW YE, that in compliance with the said proviso, I, the said
Clemence Augustus Kurtz, do hereby declare the nature of my said Invention,
to consist in obtaining a substantive coloring matter from aloes or extract of
logwood for dyeing or printing a bronze or brown color by the action of nitric
or nitrous acid upon the aloes or extract of logwood in the following manner :-
Into a vessel or boiler of one hundred gallons capacity ten gallons of water
and one hundred and thirty-two pounds weight of aloes as imported are put,
and heated together until the aloes are dissolved; eighty pounds of nitric or
nitrous acid is then added in small portions at a time, to prevent the
dissengagement of such a quantity of nitrous gas suddenly as would throw part
of the contents out of the boiler. When all tho acid is added, and the dis-
engagement of gas has ceased, ten pounds of liquid caustic, soda, or potash of
commerce of about thirty degrees is added, so as to neutralize any un-
decomposed acid remaining in the mixture as well as to facilitate the use of
the mixture subsequently in dyeing and printing. If it be wished to have the
coloring matter in a dry state, the above mixture may be incorporated with
one hundred pounds weight of china clay, and then dried either in stoves or in
a current of air. In the manufacture of the coloring matter from extract of
logwood I employ that substance instead of aloes, using the other substances
and the proportions above mentioned. The coloring matter is used in dying
by dissolving or diffusing a sufficient quantity, according to the shade required,
in a vessel of water, adding a sufficient quantity of hydrochloric acid or of
tartar of commerce to neutralize the alkali contained in the mixture, and to
leave the dye bath slightly acidulated. The material to be dyed is introduced
into the bath, which is made to boil until the desired shade is obtained. The
coloring matter is used in printing by dissolving or diffusing the mixture in a
sufficient quantity of water, according to the shade required, thickening the
same with gum or the ordinary agents used by printers for thickening their
colors, adding, as in dyeing, a sufficient quantity of hydrochloric acid or tatar
of commerce, or any other suitable super salt. After printing with the color
thus prepared, it is necessary to expose the stuffs or cloth to the operation of
steaming as practised by printers for some other colours, with a view to fix the
colour on the cloth.
Having now described the nature of my Invention, and the manner in which
the same is to be performed, I declare that I do not claim as of my Invention
the manufacture from aloes or logwood, by the action of nitric or nitrous acid,
of any ather colouring matter than a substantive colouring matter suitable for

page_text: dyeing or printing a bronze or brown colour; but what I claim as my Inven-
tion is, the manufacture of a substantive colouring matter for dyeing or printing
a bronze or brown colour from aloes and extract of logwood by means of nitric
or nitrous acid, in the manner above described.
And this my Invention being, to the best of my knowledge and belief,
entirely new and never before used within that part of Her said Majesty's
United Kingdom of Great Britain and Ireland called England, Her Dominion
of Wales, and Town of Berwick-upon-Tweed, or within Her Majesty's
Colonics and Plantations abroad, I do hereby declare this to be my Specifica-
tion of the same, and that I do verily believe this my Specification doth
comply in all respects fully and without reserve or disguise with the proviso
in the said herein-before in part recited Letters Patent contained; where-
fore I do hereby claim to maintain exclusive right and privilege to the said
Invention.
In witness whereof, I, the said Clemence Augustus Kurtz, have hereunto
set my hand and seal, this Twenty-fourth day of July, in the year of
our Lord One thousand eight hundred and forty-seven.
CLEMENCE AUGUSTUS (L.S.) KURTZ.
AND BE IT REMEMBERED, that on the Twenty-fourth day of July, in
the year of our Lord 1847, the aforesaid Clemence Augustus Kurtz came
before our said Lady the Queen in Her Chancery, and acknowledged the
Specification aforesaid, and all and every thing therein contained and specified,
in form above written. And also the Specification aforesaid was stamped
according to the tenor of the Statute made for that purpose.
Enrolled the Twenty-fourth day of July, in the year of our Lord One
thousand eight hundred and forty-seven.