An Improved Printing Process for Producing Metallic Decorations on Earthenware, Glass, and the like.
Year: 1896

page_text: Date of Application, 29th Aug., 1896-Accepted, 7th Nov., 1886
COMPLETE SPECIFICATION.
An Improved Printing Process for Producing Metallic Decorations
on Earthenware, Glass, and the like.
I, HEINRICH KUNZE, of Bergstrasse No. 15, Kolmar, i/P in the Empire of
Germany, Master Painter, 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 :-
The method of decorating porcelain, earthenware pottery, glass, enamel and'
other like goods with metals by pressuro has been hitherto carried out in the
following manner. The drawing or design printed with the usual varnish upon
the transfer paper is dusted over, if it is the so-called "skin paper" before the-
transfer, with the metals which are in powder form and mixed with the fluxing
material, and then the same are transferred to the object to be decorated and burnt.
in. Designs on other papers are first transferred to the pottery or the like, and
the design then dusted over. This process has various drawbacks, especially that.
the vapours and gases of the varnish which decomposes during the burning may
easily prevent the firm adhesion of the metal, and prevent the same from becoming
bright. Little leaves are formed which detach themselves and leave a damaged
surface behind. The consumption of metal is also a considerable one in this.
process because the metallic layer is formed not only upon the surface but also
underneath and within the flux with which it was mixed. On account of this.
uncertainty of this process by pressure, metal decoration is more frequently
practised by means of hand work. My improved process hereinafter described does.
not share these inconveniences.
The printing medium is immediately mixed with the mixed fluxing material and
the design printed with this mixture. The dusting then takes place with the
metallic powder and thereby there is obtained a compact metallic layer upon the
surface only, and with very little metal which moreover attaches itself quite
certainly. A suitable flux for metallic decoration is taken and mixed with a.
printing medium composed of turpentine, linseed oil, and ethereal oils and by means
of this the design is printed on transfer paper, which is dusted with metallic
powder, in the case of the so-called "skin paper" before the transfer, in the case
of other papers upon the goods after the transfer of the design to them. The
objects thus decorated are then burnt, and the metallic surface polished, brushed
and rubbed according as the character of the decoration requires."
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed I declare that what I
claim is :-
A printing process for the preparation of metallic decorations on earthenware,.
glass and the like, characterised by the impression of the printing and of the
Huxing mediums together, whereupon the metallic powder, free from flux, is dusted
upon the drawing.
W. P. THOMPSON & Co.,
322, High Holborn, London, W.C., Patent Ageuts for the Applicant.