IMPROVEMENTS IN PREPARING COLOURING MATTERS FOR DYEING AND PRINTING
Year: 1862

page_text: LETTERS PATENT to John Ingham, of the Valley Dye. Works, Bradford,
in the County of York, Dyer & Finisher, and William Pickard
Wood, of the same Place, Analytical Chemist, for the Invention of
"IMPROVEMENTS IN PREPARING COLOURING MATTERS FOR DYEING AND
PRINTING."
Sealed the 9th December 1862, and dated the 12th June 1862.
PROVISIONAL SPECIFICATION left by the said John Ingham and
William Pickard Wood at the Office of the Commissioners of Patents,
with their Petition, on the 12th June 1862.
We, JOHN INGHAM, of the Valley Dye Works, Bradford, in the County of
York, Dyer & Finisher, and WILLIAM PICKARD WOOD, of the same Place,
Analytical Chemist, do hereby declare the nature of the said Invention for
"IMPROVEMENTS IN PREPARING COLOURING MATTERS FOR DYEING AND PRINTING,"
to be as follows:-
This Invention consists in mixing red aniline dye with caustic soda or any
other alkali, and subjecting the same to heat until blue or violet colour is
produced as required. The mixture or compound is then dissolved in spirits
of wine or any other suitable solvent.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said John Ingham and William Pickard Wood in the Great
Seal Patent Office on the 12th December 1862.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, JOHN
INGHAM, of the Valley Dye Works, Bradford, in the County of York, Dyer
and Finisher, and WILLIAM PICKARD WOOD, of the same Place, Analytical
Chemist, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Twelfth day of June, in the year of our Lord One
thousand eight hundred and sixty-two, in the twenty-fifth year of Her reign,
did, for Herself, Her heirs and successors, give and grant unto us, the said
John Ingham and William Pickard Wood, Her special licence that we, the
said John Ingham and William Pickard Wood, our executors, administrators,
and assigns, or such others as we, the said John Ingham and William
Pickard Wood, 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 "IM-
PROVEMENTS IN PREPARING COLOURING MATTERS FOR DYEING AND PRINTING," upon
the condition (amongst others) that we, the said John Ingham and William
Pickard Wood, our executors or administrators, by an instrument in writing
under our, or their, or one of our or their 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 immediately after
the date of the said Letters Patent.
NOW KNOW YE, that we, the said John Ingham and William Pickard
Wood, do hereby declare the nature of our said Invention, and in what
manner the same is to be performed, to be particularly described and ascer
tained in and by the following statement (that is to say) :--
This Invention consists in mixing red analine dye with caustic soda or any
other alkali (except analine), and subjecting the same to heat until blue or
violet colour is produced as required. The mixture or compound is then
lissolved in spirits of wine or any other suitable solvent.
↓
In carrying this Invention into practice, we take red analine dye (well
known in commerce as roseine, fushine, or magenta), to which we add soda
or any other alkali, either organic or inorganic (except analine), or a mixture

page_text: of any two or more of these alkalies; we then heat the the mixture until the
violet or blue colour is developed. We prefer to use the following mixture,
but do not confine ourselves to it, viz., one part red analine, one part solution
of caustic soda at 56 degrees of Twaddle's hydrometer, and one part caustic
lime; this mixture is then placed in an iron or other suitable vessel and
subjected to heat in an oil bath or other contrivance, to the temperatue of
about 430 degrees of Farbenheit's thermometer, for about eight hours. The
mixture or compound is then treated with spirits of wine or other solvent, to
dissolve away the colour from the residue, and it is then ready for use.
Having thus fully described the nature of our said Invention, and the
manner in which the same is or may be performed or carried into practice,
we would have it distinctly understood that we are aware it is not new to heat
red analine alone, or in combination with other kinds, of analine, in order to
obtain colouring matters therefrom; but the mixture or compound, and
method of treating the same, which we have herein described, we believe has
not hitherto been practiced within this realm, and by which means we can
obtain superior colouring matters; and we would also observe that we do not
confine ourselves to the precise details herein set forth, of the proportions of
ingredients, or methods of treatment, as such may be altered or modified to
suit circumstances; but we claim as of our Invention the mixing of red
analine dye with soda or any other alkali, whether organic or inorganic
(except analine), and subjecting the same to heat until blue or violet colour is
produced, in manner and for purposes substantially as herein described.
In witness whereof, I, the said William Pickard Wood, for and on
behalf of myself and the said John Ingham, have hereunto set my
hand and seal, this Tenth day of December, One thousand eight
hundred and sixty-two.
WILLIAM PICKARD WOOD. (L.S.)
Signed, sealed, and delivered by the within-
named William Pickard Wood, in the
presence of
WM. TASKER,
Patent Agent,
Halifax.