AN INVENTION MADE BY ME OF EXTRACTING PRINTING AND WRITING INK FROM PRINTED AND WRITTEN PAPER, AND CONVERTING THE PAPER FROM WHICH THE INK IS EXTRACTED INTO PULP, AND MAKING THEREOF PAPER FIT FOR WRITING, PRINTING, AND OTHER PURPOSES
Year: 1800

page_text: TO ALL TO WHOM THESE PRESENTS SHALL COME, I, MATTHIAS
Koops, of Queen Street, Ranelagh, in the County of Middlesex, Gentleman,
send greeting.
WHEREAS His Majesty was graciously pleased to grant unto me, the said
Matthias Koops, Gentleman, my exors, adñors, and assigns, Letters Patent,
dated at Westminster, the Twenty-eighth day of April, in the fortieth year of
His reign, for the sole use and exercise of "AN INVENTION MADE BY ME OF
EXTRACTING PRINTING AND WRITING INK FROM PRINTED AND WRITTEN PAPER, AND
CONVERTING THE PAPER FROM WHICH THE INK IS EXTRACTED INTO PULP, AND
MAKING THEREOF PAPER FIT FOR WRITING, PRINTING, AND OTHER PURPOSES,"
within His Majesty's Kingdom of Great Britain called England, His Domi-
nion of Wales, and Town of Berwick-upon-Tweed, in such manner as I, the
said Matthias Koops, my exors, admors, and assigns, or any of them, should, in
my or their discretion, seem meet, for the term of fourteen years from the date
of the said Letters Patent; in which said Letters Patent is contained a proviso
that in case I, the said Matthias Koops, should not particularly describe and
ascertain the nature of my said Invention, and in what manner the same
is to be performed, by an instrument in writing under my hand and seal, and
cause the same to be inrolled in His Majesty's High Court of Chancery.
within six calendar months next and immediately after the date of the said
Letters Patent, then the said Letters Patent, and all liberties and advantages

page_text: anything therein-before contained to the contrary thereof in anywise notwith-
standing, as, by reference being had to the said Letters Patent, will more fully
and at large appear.
NOW KNOW YE, that in compliance with the said proviso, I, the said
Matthias Koops, do hereby declare that my said Invention is described
as follows:-.
1. I cause the English and German printed paper to be separated.
2. I have all written and printed papers sorted according to their quality.
3. The paper is to be torn into pieces, and conveyed into an engine to open
it gently, and at the same time to wash it quite clean.
4. From the engine it is to be discharged into a receiver, where it is to be
divested of the size by means of hot water:
5. It is from the receiver to be conveyed into a boiler, where I take, to
336 lb. weight of paper, 576 gallons of soft water, or sixteen barrels. Pre-
paration of the drugs.-A: I add to 11520 gallons of soft water 1800 lb. of
fresh made quick lime, which must be well stirred for four or five hours, till
the lime is totally dissolved; and when settled, B, I dissolve in twenty gallons
of lime water so prepared 241b of American potash, for the purpose of
extracting the printing ink from printed German paper, 18 lb of the same
potash for English printed paper, and 10 lb. only for written paper
A
6: 'I make the copper which contains the 576 gallons of water and 336 lb.
paper boil for half an hour, then I add gradually the before specified
quantity of potash, dissolved in the said lime water, and boil it about two hours
longer; when I examine if the ink is sufficiently loosened; if not, I boil it some
time longer, constantly stirring it. When it has boiled sufficiently I let it
remain in the copper two or three hours to macerate.
7. I then discharge it out of the copper into a receiver with a double
bottoin; the upper" bottom is of copper, with small holes, through which the
dirty and oily water drains off:
8. Out of this receiver pulp must be taken equal to 140 lb. of paper, and
put into the washing engine, where it is thoroughly cleaned from the alkali;
and in order to brighten the colour 'must be added a certain quantity of the
following solution, which is to be varied according to the quality and colour of
the pulp (that is to say):-
9. I take 150 gallons of soft water, and put it in a cask 3 lb. marine salt
and 2 lb. of black wad must then be incorporated, 'and put into a retort con-
nected with the cask containing the water, to which I add three pints of con-
centrated vitriolic acid. After properly luting it to the cask, I communicate

page_text: heat by means of a sand bath, and let it distil for six hours, after which time
the water is sufficiently impregnated.
10. To 140 lb. of paper converted into pulp, as before stated, I usually
take from ten to twelve gallons of this solution.
11. This pulp is then to be ground in order to be made into paper; or for
written paper I use the following method:-1. I take 140 lb. of assorted
clean written paper, and clean it from the size by means of boiling water; I
then put it into a box lined with copper, the sides and bottom full of holes,
which I fix in a press, and force the water out till the paper retains no more
than its own weight of water. 2, I then put it into a wooden case, the inside
covered with a thick mixture of white lead and water. The case must be well
luted with pipe clay; at the back must be a hole to receive the neck of a
retort, into which I disengage gaz made from the ingredients before described,
for impregnating the water, varying the proportion according to the condition
and colour of the articles to be whitened, and from which the writing ink is
to be extracted. 3, I then convey it into the engine, to grind it into a substance
for making paper.
In witness whereof, I, the said Matthias Koops, have hereunto set my
hand and seal, this Twenty-eighth day of October, in the year of our
T