Improvements in or appertaining to the Process for the Production of Coloured Pictures, Writing, or the like on Glass, Porcelain, Enamel, or Sheet Iron.
Year: 1895

page_text: Date of Application, 18th Dec., 1895
Complete Specification Left, 8th June. 1896-Accepted, 18th July, 1896
PROVISIONAL SPECIFICATION.
Improvements in or appertaining to the Process for the Production
of Coloured Pictures, Writing, or the like on Glass, Porcelain,
Enamel, or Sheet Iron.
A communication by WENZL KNAPP, of 21 Splachterstrasse, Hamburg, in the
Empire of Germany, Manufacturer.
I, FRANZ ALBRECHT of 6 York Buildings Dale Street, Liverpool in the
County of Lancaster, Merchant, do bereby declare the nature of this invention to
be as follows:-
This invention has for its object certain improvements in the process set forth
in the Specification of Letters Patent granted to Wenzl Knapp, No. 13838 of
1893 of which I am the registered proprietor, and is designed to enable practically
indestructible coloured pictures or letters to be imparted to straight or curved
surfaces of glass, porcelain, stoneware, enamel or sheet iron, by an exceptionally
simple and cheap method. By the previous method set forth in the patent
aforesaid it was found that the pictures etcetera were liable to come off or be
obliterated in course of time. My present invention is designed to render them
practically indestructible. The process is suitable for use in wholesale manu-
factures, as for example of beer bottles, with distinctive marks. The usual
labelling of such bottles which must be repeated with each tilling can with
advantage be replaced by an impregnation which does not leave the mark less
clear, but on the contrary makes it practically indestructible by chemical or
mechanical means. The improved process is carried out as follows-An amount
is taken for example of

page_text: attempt to remove the coloured picture by water or by boiling water or other
ordinary means has in practice been without success.
Dated this 17th day of December 1895.
WM. P. THOMPSON & Co.,
Of 6, Lord Street, Liverpool, Patent Agents for the Applicant.
Improvements in or appertaining to the Process for the Production
of Coloured Pictures, Writing, or the like on Glass, Porcelain,
Enamel, or Sheet Iron.
A communication by WENZL KNAPP, of 21, Splachterstrasse, Hamburg, in the
Empire of Germany, Manufacturer.
I, FRANZ ALBRECHT, of 6, York Buildings, Dale Street, Liverpool, in the
County of Lancaster, Merchant, do hereby declare the nature of this invention and
in what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement :-
This invention has for its object certain improvements in the process set forth
in the Specification of Letters Patent granted to Wenzl Knapp, No. 13838/93, of
which I am the registered proprietor.
It is designed to enable practically indestructible coloured pictures or letters to be
imparted to straight or curved surfaces of glass, porcelain, stoneware, enamel,
sheet iron or the like by an exceptionally simple and cheap method. By the
method set forth in the patent aforesaid it has been found that the pictures forme.l
were liable to come off or be obliterated in course of time.
My present invention is designed to render them practically indestructible.
The process is suitable for use in wholesale manufactures, as for example such
goods as beer bottles having distinctive marks. The usual labelling of such
bottles requires to be repeated with each filling and can with advantage be replaced
by my process by a single impregnation which does not leave the mark less clear,
but on the contrary makes it practically indestructible by ordinary chemical and
mechanical wear. The improved process is carried out as follows:- From 25 to
35 grammes of chemically pure caustic soda, or its equivalent caustic potash,
though there is no advantage in using potash, is melted together with 25 to
35 grammes of lime, 7 to 13 grammes of sulphate of soda, 3 to 7 grammes of
sulphate of magnesia, and from 125 grammes to 1000 grammes of soda water-
glass 38 per cent., or equivalent of other alkaline silicate. The solution is
thoroughly mixed and may if desired be allowed to stand long enough to clear.
A rubber plate carrying the required drawing in relief is covered or coated with
solution by a roller such as printers use which takes up the fluid. The moistened
rubber plate is then pressed on the object to be treated. This can be effected in
the case of bottles by their being rolled on the rubber plate. The imprint
retained on the glass bottle is now covered with any required colour powder more
especially mineral colour powder which will not be injured by the heat used and
which will not have any chemical effect on the silicate of soda solution. If
pictures in several colours are to be produced this is more efficiently done by
rubbing in the dry powder, when by the use of suitable patterns those parts of the
picture which have to receive the same colour can be coloured. Coloured powder
may if desired be added to the solution before the imprint is made so that a
coloured print is made direct. After the imprint is taken, the pictures on the
articles are dried and for this purpose they are raised to a suitable temperature
the hotter the better so long as it does not injure the goods on which the imprint

page_text: is made, and an imprint of the picture results. Any attempt to remove the colour
powder by boiling water or other ordinary means has in practice been without
success.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same has to be performed, I declare that what I
claim is :-
1. The improvement on the invention of Wenzl Knapp aforesaid substantially
as herein specified, whereby a very indestructible label, picture or inscription is.
formed on glass and other surfaces.
Dated the 6th day of Tum 1000
WM. P. THOMPSON & Co.,
Of 6 Lord Street, Liverpool, Patent Agents for the Applicant.