PROCURING A COLORING MATTER FROM THE REFUSE OF IRONSTONE, CALLED COLOUR SPERT
Year: 1861

page_text: LETTERS PATENT to William Pask, of Sydney, in the County of Gloucester,
Manufacturing Chemist, for the Invention of "PROCURING A COLORING
MATTER FROM THE REFUSE OF IRONSTONE, CALLED COLOUR SPERT."
Sealed the 19th November 1861, and dated the 6th July 1861.
PROVISIONAL SPECIFICATION left by the said William Pask at the
Office of the Commissioners of Patents, with his Petition, on the 6th
July 1861.
I, WILLIAM PASK, of Sydney, in the County of Gloucester, Manufacturing
Chemist, do hereby declare the nature of the said Invention for "PROCURING
A COLORING MATTER FROM THE REFUSE OF IRONSTONE, CALLED COLOUR SPERT," to be
as follows:-
1st, colour spert is known in the Forest of Dean to be an inferior kind of
ironstone, and to contain a very small portion of iron ore and colouring
matter, rejected by ironmasters and others, heretofore considered of no value,
and is usually cast aside at the pit's mouth as worthless.
2nd, I take a quantity of this mineral or refuse of ironstone and put it into
à cast-iron mill, with iron or stone runners, worked by horse or steam or water
power; in which mill I crush and pulverise such mineral, and bring the whole
into a fine powder. I then put the powder into a tub (or tank) and wash it
by stirring it about, when the colouring matter, at a particular stage of the
washing, is suspended in solution, and the heavier or gritty substances sink.
I then instantly pour off the water containing such colouring matter into
another vessel. I allow this to stand for the space of six hours, at the end of
which time I pour off the water from the colouring matter, which by this time
has been precipitated to the bottom of the last-mentioned vessel.
I then put

page_text: the sediment, which is, in fact, the colouring matter obtained as before stated,
into a stove constructed of fire-clay or brick, and therein dry it, when the
colouring matter is perfected and rendered fit for use.
Lastly, I claim for my Invention the making of a colouring matter from a
mineral heretofore considered useless, of no value, and not before used for the 5
purpose of obtaining colouring matter, and particularly in extracting the
colouring matter contained in the refuse of ironstone from the gritty substance
found in such refuse.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said William Pask in the Great Seal Patent Office on the
2nd December 1861.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, WILLIAM
PASK, of Sydney, in the County of Gloucester, Manufacturing Chemist, send
greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Sixth day of July, in the year of our Lord One
thousand eight hundred and sixty-one, in the twenty-fifth year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto me,
the said William Pask, Her special licence that I, the said William Pask,
my executors, administrators, and assigns, or such others as I, the said
William Pask, my 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 "PROCURING.A
COLORING MATTER FROM THE REFUSE OF IRONSTONE, CALLED COLOR SPERT," upon
the condition (amongst others) that I, the said William Pask, my executors
or administrators, by an instrument in writing under my, or their, or one of
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 I, the said William Pask, do hereby declare
the nature of my said Invention, and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
statement, that is to say:

page_text: Color spert is known in the Forest of Dean to be an inferior kind of iron-
stone, and to contain a very small quantity of iron ore and coloring matter,
but rejected by ironmasters and others, being heretofore considered of no
value, and is usually cast aside in the pit or at the pit's mouth as worthless.
I take a quantity of the mineral or refuse of ironstone and put it into a
cast-iron mill, with iron or stone runners or rollers, fluted and plain, worked
by horse or steam or water power; in which mill I crush and pulverise such
mineral, and bring the whole into a fine powder. I then put this powder into
a tub or tank containing water, and wash it by stirring it about either by the
hand or by a process called tossing or tozing, when the coloring matter, at a
particular stage of the washing, is suspended in solution, and the heavier or
gritty substances sink. I then instantly pour off the water containing such
coloring matter into another vessel. I allow this to stand for the space of six
hours, or such time as in my judgment is necessary, and it appears that the
coloring matter or sediment has all sunk to the bottom. At this time I pour
off the water from the coloring matter, which by this time has been pre-
cipitated to the bottom of the last-mentioned vessel, and collect it together.
I then put the sediment, which is, in fact, the coloring matter, obtained as
before stated, into a stove constructed of fire-clay or brick, and therein dry it,
when the coloring matter is perfected and rendered fit for use.
I claim for my Invention the making of coloring matter from a mineral
heretofore considered useless, of no value, and not before used for the purpose
of obtaining coloring matter, and particularly in extracting the coloring
matter contained in the refuse of ironstone from the gritty substances found in
such refuse.
In witness whereof, I, the said William Pask, have hereunto set my
band and seal, this Thirtieth day of November, in the year of our Lord
One thousand eight hundred and sixty-one.
WILLIAM PASK. (L.S.)
Signed, sealed, and delivered by the
above-named William Pask, in
the presence of
JAMES WINTLE, Solicitor,
Newnham, Gloucestershire.