IMPROVEMENTS IN DYEING BY THE APPLICATION OF MATERIALS NOT HITHERTO SO USED
Year: 1837

page_text: TO ALL TO WHOM THESE PRESENTS SHALL COME, we, ALEXANDER
DIXON and JAMES DIXON, of Cleckheaton, near Leeds, in the County of York,
Manufacturing Chemists, send greeting.
WHEREAS His late most Excellent Majesty King William the Fourth,
by His Letters Patent under the Great Seal of Great Britain, bearing date
at Westminster, the Twenty-ninth day of April, in the seventh year of His
reign, did, for Himself, His heirs and successors, give and grant unto us, the
said Alexander Dixon and James Dixon, His especial licence, full power, sole
privilege and authority, that we, the said Alexander Dixon and James Dixon,
our exors, admors, and assigns, or such others as we, the said Alexander
Dixon and James Dixon, our 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 might make, use, exercise,
and vend, within England, Wales, and the Town of Berwick-upon-Tweed, the
Invention of "IMPROVEMENTS IN DYEING BY THE APPLICATION OF MATERIALS NOT
HITHERTO SO USED;" in which said Letters Patent is contained, a proviso that we,
the said Alexander Dixon and James Dixon, or one of us, shall cause a par-
ticular description of the nature of the said Invention, and in what manner the
same is to be performed, to be inrolled in His said Majesty's High Court of

page_text: Chancery within six calendar months next and immediately after the date of
the said in part recited Letters Patent, as in and by the same, reference being
thereunto had, will more fully and at large appear.
NOW KNOW YE, that in. compliance with the said proviso, we, the said
Alexander Dixon and James Dixon, do hereby declare the nature of our said
Invention, and the manner in which the same is to be performed, are fully
described and ascertained in and by the following statement thereof (that
is to say):
According to the ordinary processes of dyeing browns, greens, olives, Saxon
blues, and blacks, a substance called "argal" (crude tartar) is employed as a
mordant, as is well understood by dyers, which is an expensive material.
Now the object of our Invention is to employ sulphate of soda as a mordant
in the process of dyeing in the place of argal, by which the process of dyeing
will be materially improved, both as to the cost thereof and in other particulars.
The sulphate of soda is to be ground and sifted, in order to obtain it in the
state of fine power, similar to the condition in which argal is prepared
for the dyer; and the subsequent treatment of sulphate of soda is similar to
that-pursued in preparing and employing argal as a mordant, and a dyer
acquainted with the ordinary process of using argal will, by substituting
sulphate of soda, find the working of our Invention readily to be performed,
and he will find that in many respects the colours will be produced more
readily than when argal is used, and hence the time occupied in the dyeing
of some colours will be shortened. It should be remarked, that the sulphate
of soda obtained from the nitrate of soda is that which is most generally
effective for the various colours above mentioned, but the sulphate of soda
obtained from common salt (muriate of soda), though less valuable as
requiring more observation and care of the dyer, may be advantageously
employed for a mordant in dyeing heavy colours, particularly of browns and
greens.
Having thus explained the nature of our Invention, and the manner
in which the same is to be performed, what we claim as our Invention is,
the-using-sulphate of soda in the process of dyeing, as above described.
: . In witness whereof, I, the said Alexander Dixon have hereunto set
my hand. and seal, this Twenty-fifth day of October, in the year of
our Lord One thousand eight hundred and thirty-seven.
ALEXANDER (L.S.) DIXON,

page_text: AND BE IT REMEMBERED, that on the Twenty-fifth day of October,
in the year of our Lord 1887, the aforesaid Alexander Dixon came before
our said Lady the Queen in Her Chancery, and acknowledged the Specifica-
tion 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.
Inrolled the Twenty-eighth day of October, in the year of our Lord One
thousand eight hundred and thirty-seven.