Improvements in and relating to Plates or Stencils for Painting and Graining.
Year: 1896

page_text: Date of Application, 10th Mar., 1896
Complete Specification Left, 20th Oct., 1896-Accepted, 19th Dec., 1896
PROVISIONAL SPECIFICATION.
Improvements in and relating to Plates or Stencils for Painting and
Graining.
I, LOUIS HINTZ, of VII Josika u. 9. Budapest, in the Kingdom of Hungary
and Empire of Austria, do hereby declare the nature of this invention to be as
follows:-
The object of the present application for Letters Patent consists of a plate for
wood painting devised to replace with advantage the hitherto usual hand labour
and work in the graining or imitating of various woods. Further, it is designed
to replace wood painting plates hitherto in use constructed of prepared materials
with interwoven fabrics, by a completely resistant and durable plate in which the
various figures to be produced as well as the lines for imitating the graining and
so forth are not pierced either by hand or machine labour, but are prepared
chemically whereby the most complicated figures are reproduced with exactitude
and pierced naturally and sharply.
The materials preferably employed for the plates are thin but resistant zinc,
brass, or copper plates.
The process for the piercing of the plates is carried out in the following
manner:
An intimate mixture is made of about 3 parts turpentine to about 2 parts
of asphaltum and in this mixture about one part of wax is dissolved, these
proportions may be somewhat varied according to need. This mixture resists
acids and is consequently insensitive to aqua fortis, hydrochloric acid, vitriol, and
other similar corrosive fluids. Metals on the other hand such as zinc, brass,
copper and so forth are attacked by such fluids more or less corroded according to
the degree of strength of the fluid. The zinc, brass or copper plates are then
painted with the above mentioned mixture with the representation of the lines
and workings of the various kinds of wood to be reproduced. The backs of the
plates may also be covered with the same mixture or simply with asphaltum or
shellac and carefully dried. After the plates are perfectly dry they are placed in
the corrosive fluid and preferably zinc plates are placed in aqua fortis, brass or
copper plates in diluted hydrochloric acid or vitriol. The fluid corrodes all places
which are not covered with the protecting coating. When the corrosion is
completed the surface of the plate covered with the preparation or with the shellac
or asphaltum is cleaned with turpentine or spirit, rubbed dry with sawdust and
the required perforated pattern plate is obtained.
In preparing large numbers of plates the drawing to be copied or the original
sample is preferably reproduced upon the plates by an autographic or a photographic
process and the operation is conducted further as already described.
Dated this 10th day of March 1896.
W. P. THOMPSON & Co.,
31, High Holborn, London, W.C., Patent Agents for the Applicant.

page_text: COMPLETE SPECIFICATION.
Improvements in and relating to Plates or Stencils for Painting and
Graining.
I, LOUIS HINTZ, of VII Josika u. 9. Budapest, in the Kingdom of Hungary
and Empire of Austria, 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 object of the present application for Letters Patent consists of a plate for
wood painting devised to replace with advantage the hitherto usual hand labour
and work in the graining or imitating of various woods. Further, it is designed
to replace wood painting plates hitherto in use constructed of prepared materials
with interwoven fabrics, by a completely resistant and durable plate in which the
various figures to be produced as well as the lines for imitating the graining and
so forth are not pierced either by hand or machine labour, but are prepared
chemically whereby the most complicated figures are reproduced with exactitude
and pierced naturally and sharply.
The materials preferably employed for the plates are thin but resistant zinc,
brass or copper plates.
The process for the piercing of the plates is carried out in the following
manner :-
An intimate mixture is made of about 3 parts turpentine to about 2 parts of
asphaltum and in this mixture about one part of wax is dissolved, these proportions
may be somewhat varied according to need. This mixture resists acids and is
consequently insensitive to aqua fortis, hydrochloric acid, vitriol, and other similar
corrosive fluids. Metals on the other hand such as zinc, brass, copper and so
forth are attacked by such fluids more or less corroded according to the degree of
strength of the fluid. The zinc, brass or copper plates are then painted with the
above mentioned mixture with the representation of the lines and markings of the
various kinds of wood to be reproduced. The backs of the plates may be also
covered with the same mixture or simply with asphaltum or shellac and carefully
dried. After the plates are perfectly dry they are placed in the corrosive fluid
and preferably zinc plates are placed in aqua fortis, brass or copper plates in
diluted hydrochloric acid or vitriol. The fluid corrodes all places which are not
covered with the protecting coating. When the corrosion is completed the surface
of the plate covered with the preparation or with the shellac or asphaltum is
cleaned with turpentine or spirit, rubbed dry with sawdust and the required
perforated pattern plate is obtained.
In preparing large numbers of plates the drawing to be copied or the original
sample is preferably reproduced upon the plates by an autographic or a photo-
graphic process and the operation is conducted further as already described.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
1. The process for the preparation of stencil plates for imitating graining or
the like consisting in the protecting portions of a metal plate with a non-corrosive
preparation, and subsequent treatment of the plate with acid to produce a stencil
of the required pattern.

page_text: 2. The improved stencil for imitating the graining or pattern of wood or the
like substantially as described.
Dated the 20th day of October 1896.
W. P. THOMPSON & Co.,
322 High Holborn, W.C., Agents for the Applicant.