IMPROVEMENTS IN GILDING AND SILVERING SILK AND OTHER FIBROUS SUBSTANCES
Year: 1860

page_text: LETTERS PATENT to Charles François Jules Fonrobert, of Berlin, .in.
Prussia, for the Invention of "IMPROVEMENTS IN GILDING AND SILVERING
SILK AND OTHER FIBROUS SUBSTANCES."-A communication from abroad,
M
Sealed the 17th August 1860, and dated the 25th February 1860.
PROVISIONAL SPECIFICATION left by the said Charles François Jules,
Fonrobert at the Office of the Commissioners of Patents, with his,
Petition, on the 25th February 1860.
I, CHARLES FRANÇOIS JULES FONROBERT, of Berlin, in Prussia, do hereby.
3 declare the nature of the said Invention for "IMPROVEMENTS IN GILDING AND
SILVERING SILK AND OTHER FIBROUS SUBSTANCES," to be as follows:-
I grind gold or silver leaf on a slab with a muller or otherwise, mixing it
with gum water or other viseid liquid until it is reduced to a very fine or
impalpable powder. This is washed with pure water to remove the gum.
The silk thread or other substance is then prepared by soaking or boiling in
a solution of chloride of zinc, or other chloride or salt having a similar effect,
and it is then washed in water, and again boiled in water in which the
aforesaid gold or silver powder is diffused. It is then again washed in
by the ordinary processes of
water, and dried.
polishing.
Lustre may be given to it

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Charles François Jules Fonrobert in the Great Seal Patent
Office on the 21st August 1860.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, CHARLES
FRANÇOIS JULES FONROBERT, of Berlin, in Prussia, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Twenty-fifth day of February, in the year of our
Lord One thousand eight hundred and sixty, in the twenty-third year of
Her reign, did, for Herself, Her heirs and successors, give and grant unto
me, the said Charles François Jules Fonrobert, Her special licence that I,
the said Charles François Jules Fonrobert, my executors, administrators, and
assigns, or such others as I, the said Charles François Jules Fonrobert,
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 "IMPROVEMENTS IN GILDING AND
SILVERING SILK AND OTHER FIBROUS SUBSTANCES," communicated to me from
abroad by Mr. Müller, residing at Berlin, in Prussia, upon the condition
(amongst others) that I, the said Charles François Jules Fonrobert, 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 Charles François Jules Fonrobert,
do hereby declare the nature of the said Invention, and in what manner,
the same is to be performed, to be particularly described and ascertained
in and by the following statement thereof, that is to say:―
I grind gold or silver leaf on a slab with a muller or otherwise, mixing it
with gum water or other viscid liquid until it is reduced to a very fine or
impalpable powder. This is washed with pure water to remove the gum, as
in the ordinary process of preparing gold and silver in fine powder for painting.
The silk thread or other fibrous substance is then prepared by soaking. or
boiling in a solution of chloride of zinc, and it is then washed in water, and
again boiled in water in which the aforesaid gold or silver powder is diffused.

page_text: with a coating of gold or silver. Lustre may be given to it by the ordinary
precesses of poliching
In witness whereof, I, the said Charles François Jules Fonrobert, have
hereunto set my hand and seal, this Thirteenth day of August, in the
year of our Lord One thousand eight hundred and sixty.
In witness whereof, I, the said Charles François Jules Fonrobert, have
hereunto set my hand and seal, this Thirteenth day of August, in the
year of our Lord One thousand eight hundred and sixty.
CHARLES FRANÇOIS JULES FONROBERT. (L.S.)