Improvements in the Decorative Treatment of Wooden Surfaces.
Year: 1898

page_text: Date of Application, 13th Dec., 1898-Accepted, 28th Jan.,
1899
COMPLETE SPECIFICATION.
Improvements in the Decorative Treatment of Wooden Surfaces.
I, HERMANN BUYTEN, Manufacturer, of Wehrhahn, Düsseldorf, in the German
Empire, 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 relates to the production of plastic ornaments on wooden surfaces
by means of the sandblast, which causes the grain of the wood to appear in relief.
The wood is in the well-known manner first rendered even and smooth by planing,
grinding, polishing or similar operations, or it is provided with relief ornaments by
engraving or cutting, or it is inlaid with wood, metal or other suitable material.
Subsequently those parts which are not to be touched by the sandblast, but intended
to form a smooth pattern in the plastically grained wood, for instance the inlaid or
engraved parts, are protected against the sandblast by a stencil plate of prepared
paper, india-rubber, or other suitable material adapted to resist the sandblast. For
securing the stencil plate on the wooden surface, I use an adhesive substance
mixed with glycerine or other substance adapted to facilitate the subsequent
removal of the stencil plate. Instead of applying a stencil plate by means of an
adhesive substance, those parts of the surface, on which the sandblast is not
intended to operate, are coated with a suitable protective substance made so that
it can be easily removed after the operation. If after the sandblast treatment the
stencil plate or the protective coating is removed, those parts which have been thus
covered, will be found to project slightly over the remainder of the surface and to
be smooth, while on the other parts the wood has been attacked by the sand blast
more or less, according to the degree of hardness of the different parts, so that not
only the ornamental design, but also the grain of the wood, appears in relief. The
wooden surface is now finished by treating it with a soft steel wire brush, so as to
remove the burs or rough edges produced by the sand blast process, and also any
splinters of wood which may still adhere to the surface.
The parts which have not been touched by the sand-blast may remain smooth,
or they may be further treated in any desired manner.
If the wood is to be stained, the ornaments may easily be coloured differently
from the parts treated with the sand-blast.
In this case the stain is applied to the wood, before the stencil plate on the pro-
tective coating has been removed, so that only the parts treated with the sand-
blast will be stained, while the ornamental pattern remains free from the staining
liquid, or the surface may be stained again after the removal of the stencil plate,
preferably with a lighter coloured stain, so that the ornaments will have a lighter
colour, than the remainder of the surface. Or this treatment may be further
modified by removing ouly a portion of the stencil plate before the second staining,
and applying an additional stain after the complete removal of the stencil plate. In
this manner any desired number of shades or colours may be produced on the
wood.
The wood may, however, be stained before the application of the sand-blast, and
after the latter has been applied, but before the stencil plate or protective coating

page_text: has been removed, the low-lying part may be treated with a stain of a different
colour.
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 production of plastic ornaments in addition to plastic wood
graining on smooth or engraved or inlaid wood, which consists in applying to the
same stencil plates or a protective coating, according to the desired pattern, then
applying a sand-blast and subsequently finishing the surface with a brush,
substantially as described.
2. In the decoration of wood surfaces with plastic ornaments in addition to wood
graining, by means of the sand blast and stencil plates or protective coatings, the
application of stain, either before the stencil plate or protective coatings, or after
the treatment with the sandblast, in order to colour the parts touched by the sand-
blast differently from the ornaments or pattern, substantially as described.
3. The herein described processes for decorating wooden surfaces with plastic
ornaments or patterns in addition to plastic wood graining, by means of the sand
blast.
Dated this 13th day of December 1808
FAIRFAX & WETTER,
Agents, 37 and 39, Essex Street, Strand, London.