AN IMPROVED METHOD OF INDIGO BLUE DYEING
Year: 1858

page_text: LETTERS PATENT to John Brazil, of Manchester, in the County of Lan-
caster, Calico Printer, and Joseph M Kinnell, of the same Place, Calico
Printer, for the Invention of "AN IMPROVED METHOD OF INDIGO BLUE
DYEING."A communication.
Sealed the 25th February 1859, and dated the 30th August 1858.
PROVISIONAL SPECIFICATION left by the said John Brazil and Joseph'
M Kinnell at the Office of the Commissioners of Patents, with their
Petition, on the 30th August 1858.
We, JOHN BRAZIL, of Manchester, in the County of Lancaster, Calico
Printer, and JOSEPH MCKINNELL, of the same Place, Calico Printer, do hereby
declare the nature of the said Invention for "AN IMPROVED METHOD OF INDIGO
BLUE DYEING," which has been communicated to us from a person residing
abroad, to be as follows:-
The improvement consists in dipping two pieces of fabric (placed back to
back) simultaneously into the indigo dyeing liquid, so that the two back
surfaces of the cloth may be in close contact and unexposed to the atmosphere,
allowing only the two outside or face surfaces to be exposed to the oxygen of
the atmosphere, which has the effect of causing the outer or face surfaces to
absorb a greater quantity of the indigo dye than the back or inner surfaces,

page_text: by which method of dyeing the face sides of the cloth will present a dark blue,
and the back sides a light blue, and consequently an economy in the dyeing is
effected.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said John Brazil and Joseph McKinnell in the Great Seal Patent
Office on the 28th February 1859.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, JOHN
BRAZIL, of Manchester, in the County of Lancaster, Calico Printer, and JOSEPH
MOKINNELL, of the same Place, Calico Printer, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Thirtieth day of August, in the year of our Lord
One thousand eight hundred and fifty-eight, in the twenty-second year of
Her reign, did, for Herself, Her heirs and successors, give and grant unto
us, the said John Brazil and Joseph McKinnell, Her special license that we,
the said John Brazil and Joseph McKinnell, our executors, administrators,
and assigns, or such others as we, the said John Brazil and Joseph McKinnell,
our 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 "AN IMPROVEMENT IN INDIGO BLUE
DYEING," which has been communicated to us by a foreigner residing abroad,
upon the condition (amongst others) that we, the said John Brazil and Joseph
McKinnell, by an instrument in writing under our hands and seals, should
particularly 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 filed
in the Great Seal Patent Office within six calendar months next and imme-
diately after the date of the said Letters Patent.
NOW KNOW YE, that we, the said John Brazil and Joseph McKinnell,
do hereby declare the nature of the 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 :-
The improvement consists in dipping two pieces of fabric (placed back to
back) simultaneously into the indigo dyeing liquid, so that the two back
surfaces of the cloth may be in close contact and unexposed to the atmosphere,

page_text: allowing only the two outside or face surfaces to be exposed to the oxygen of
the atmosphere, which has the effect of causing the outer or face surfaces to
absorb a greater quantity of the indigo or dye than the back or inner surfaces,
by which method of dyeing the face sides of the cloth will present a dark blue,
and the back sides a light blue colour, and consequently an economy in the
dyeing is effected.
In witness whereof, we, the said John Brazil and Joseph McKinnell,
have hereunto set our hands and seals, this Twenty-sixth day of
February, in the year of our Lord One thousand eight hundred and
fifty-nine.
JOHN BRAZIL.
(L.S.)
JOSEPH MOKINNELL. (L.S.)
JOHN BRAZIL.
(L.S.)
JOSEPH MOKINNELL. (L.S.)