IMPROVEMENTS IN CERTAIN MATERIALS TO BE USED IN DYEING AND PRINTING
Year: 1849

page_text: TO ALL TO WHOM THESE PRESENTS SHALL COME, we, JOHN
MERCER, of Oakenshaw, in the County of Lancaster, Gentleman, and WILLIAM
BLYTH, of Holland Bank, Oswaldwistle, in the same County, 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 Twelfth day of October
now last past, did, for Herself, Her heirs and successors, give and grant unto
us, the said John Mercer and William Blyth, our exors, adñiors, and assigns,
or such others as we, the said John Mercer and William Blyth, our exors,
admors, and 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 might make, use, exercise, and vend, within England, Wales, and
the Town of Berwick-upon-Tweed, our Invention of "IMPROVEMENTS IN
CERTAIN MATERIALS TO BE USED IN DYEING AND PRINTING;" in which said Letters
Patent is contained a proviso, obliging us, the said John Mercer and William
Blyth, by an instrument in writing under our hands and seals, or under
the hand and seal of one of us, particularly to describe and ascertain the
nature of our said Invention, and in what manner the same is to be performed,
and to cause the same to be enrolled in Her said Majesty's High Court of
Chancery within six calendar months next and immediately after the date of
the said recited. Letters Patent, as in and by the said Letters Patent, reference
being thereunto had, will more fully and at large appear.

page_text: NOW KNOW YE, that in compliance with the said proviso, we, the said
John Mercer and William Blyth, do hereby declare the nature of our said
Invention to consist in making double salts: in a solid or concrete state
composed of oxide of tin, or stannic acid and phosphoric acid, arsenic acid, or
arsenious acid and soda, which are or may be called phospho-stannate of soda,
arsino-stannate of soda, &c. These concrete or dry or solid double salts
we dissolve in water, and use instead of and for all purposes for which stannate
of soda is used in dyeing and printing cottons, delains, and other fabrics.
All
the double salts of phosphoric, arsenic, or arsenious acids, with stannic acid and
potash, soda, or ammonia, will answer, but we prefer the arsenio-stannate
of soda. We make it simply by adding to stannate of soda, arseniate of soda,
(made by fluxing or heating equal weights of white arsenic and nitrate of soda
together,) in such proportions as form the strongest solid or concrete salt;
this is about equal equivalents of arsenic acid and stannic acid. We take one
gallon of stannate of soda liquor, at about fifty Twaddel; and dissolve in it (in
an iron vessel on the fire) one and a half pound of arseniate of soda, made
as before stated. A little of the thin mixture, while lot on the fire, is taken
out and dropped on a cold plate, or stone; if it immediately concrete into a
solid, the fluid may be poured out on any suitable bed or receptacle, when it
becomes solid as soon as cold. This constitutes our solid or concrete arsénio-
stannate of soda. .
We do not confine ourselves to the above particular way of adding the
arseniate or phosphate of soda (should phosphate be desired), for the arseniate
or phosphate may be added to the, soda before the tin, or before the soda
be made into stannate, of, soda. The arsenate of soda, phosphate of soda,
or arsenious acid, may be added before, or along with, or after the oxide of tin
or stannic acid is united to the soda, and in all cases the same arsenio-stannate
of soda, is formed.
We do not claim any particular mode of making the stannate of soda; any
of the well-known ways will make a stannate suitable for our purpose in
making double salts, as here described. But what we claim is the sole manu-
facture and use of the solid or concrete double salts composed of arsenic acid
or arsenious acid, and stannic acid, and soda, potash, or ammonia, and 'phos-
phoric acid, and stannic acid, and soda, potash, or ammonia. These, to the
best of our knowledge and belief,,have never before been used in printing or
dyeing, and their mode of preparation, here fully described, has never been
before used at all 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. We do hereby declare this to be our

page_text: Specification of the same, and that we do verily believe this our said Speci-
fication doth comply in all respects, fully and without reserve or disguise,
with the proviso in the said herein-before in part recited Letters Patent.
Wherefore we do hereby claim to maintain exclusive right and privilege
to our said Invention.
Specification of the same, and that we do verily believe this our said Speci-
fication doth comply in all respects, fully and without reserve or disguise,
with the proviso in the said herein-before in part recited Letters Patent.
Wherefore we do hereby claim to maintain exclusive right and privilege
to our said Invention.
In witness whereof, we, the said John Mercer and William Blyth, have
hereunto set our hands and seals, this Ninth day of April, One thousand
Enrolled the Eleventh day of April, in the year of our Lord One thousand
eight hundred and fifty.