A New or Improved Process for the Production of Mosaic. and the like Decorations.
Year: 1890

page_text: Date of Application, 12th Aug., 1890
Complete Specification Left, 6th May, 1891-Accepted, 13th June, 1891
PROVISIONAL SPECIFICATION.
A New or Improved Process for the Production of Mosaic. and the
like Decorations.
I, FRANZ FORCHER VON AINBACH of Knittelfeld, Steirmark, Austria
Hungary Gentleman do hereby declare the nature of this invention to be as
follows:-
This invention relates to a new or improved process for the production of stony
polychrome decorations which I term mosaic of Pompei. According to this
process I am able to produce polychrome decorations exhibiting a brilliant and
variegated blending of colors and capable of withstanding the action of the
weather, by casting suitable stony substances upon large surfaces of any suitable
material.
In carrying my invention into practice 1 may use any kind of metallic cement
such as cements prepared with zinc compounds oxide of lead or magnesia. Natural
stones clay and the like are decorated in the following manner:
The cement is brought to a pasty consistence dyed by means of mineral colors
according to the shade or tint required and mixed with a suitable number of small
pieces of marble, lapisluzuli, malachite and the like in the proportions of to 20
according to the nature of the surface being coated. The mass is then transferred
upon the moistened or roughened surface in a manner corresponding with the design
of the decoration. Each color is added to the other in the necessary strength or
thickness and subsequently washed according as required until the desired object is
attained the whole being finally subjected to pressure. After drying, the hardened
coloured surfaces is ground and polished as far as possible.
If necessary the decorated surface may be further, previously recessed sub-
sequently inlaid and finally polished.
Should it be desired to furnish artificial stones with such polychrome decorations,
the outline of the decorations are delineated in the course of the process by means
of moulds or patterns and subsequently inlaid in the manner before described.
When it is not required to polish flatly the colored transfers but to form instead
a colored relief or cameo upon a flat or polished ground the colored transfers are
first moulded, allowed to harden and subsequently impregnated with or embedded
in the above described in laying material.
The Pompeian mosaic is especially suitable on account of its durability and
brilliancy of colors which resembles the products from the gobelins and is particu-
larly adaptable for the decorations of buildings owing to its being easily applicable
in large plates or sheets.
When the surfaces to be decorated are already set or tempered, the same process
may be used but the temperature should not be allowed to sink below 0 as the
hardening will not take place at such temperature.
The term Pompeian mosaic has been used as the work produced according to this
invention bears a strong resemblance thereto.
Dated this 12th day of August 1890.
HUGHES, SON & Co.,
38, Chancery Lane, London, Agents.

page_text: COMPLETE SPECIFICATION.
A New or Improved Process for the Production of Mosaic and the
like Decorations.
I, FRANZ FORCHER VON AINBACH, of Knittelfeld, Steiermark, Austria-
-Hungary, Manufacturer, do hereby declare the nature of this invention and in
what manner the same is to be performed, to be particularly described and ascer-
.tained in and by the following statement :-
This invention relates to a new or improved process for the production of stony
polychrome decorations, which I term "mosaic of Pompei." According to this
• process, I am able to produce polychrome decorations exhibiting a brilliant and
variegated blending of colours, and capable of withstanding the action of the
weather, by casting suitable stony substance upon large surfaces of any suitable
material.
In carrying my invention into practice, I may use any kind of metallic cement,
such as cements prepared with zinc compounds, oxide of lead or magnesia. Natural
stones, clay and the like are decorated in the following manner.
The cement is brought to a pasty consistence, dyed by means of mineral colors
according to the shade or tint required, and mixed with a suitable number of small
pieces of marble, lapis-lazuli, malachite and the like in the proportions of 1 to 20
according to the nature of the surface being coated.
The mass is then transferred upon the moistened or roughened surface in a
manner corresponding with the design of the decoration. Each color is added to
the other in the necessary strength or thickness, and subsequently washed according
as required until the desired object is attained, the whole being finally subjected to
pressure.
After drying, the hardened colored surface is ground and polished as far as
possible.
If necessary, the decorated surface may be further previously recessed, sub-
sequently inlaid, and finally polished.
Should it be desired to furnish artificial stones with such polychrome decorations,
the outline of the decorations are delineated in the course of the process by means
of moulds or patterns and subsequently inlaid in the manner before described.
When it is not required to polish flatly, the colored transfers, but to form instead
a colored relief or cameo upon a flat or polished ground, the colored transfers
are first moulded, allowed to harden, and subsequently impregnated with
embedded in the above described inlaying material, and the colors enlivened by
known means.
or
The Pompeian mosaic is especially suitable on account of its durability and
brilliancy of the colours which resembles the products from the gobelius and is
particularly adaptable for the decorations of buildings, owing to its being easily
applicable in large plates or sheets.
When the surfaces to be decorated are already set or tempered, the same process
may be used, but the temperature should not be allowed to sink below 0° Fah. as
the hardening will not take place at such temperature.
The term Pompeian mosaic has been used, as the work produced according to
this invention, bears a strong resemblance to munal painting or stucco-work.
A few examples will serve to render the foregoing description more clearly
understood.
a) TO PRODUCE A POLYCHROME DECORATION BY MEANS OF STONY
NAT STONE

page_text: Upon this the adhesive material is laid by hand as in oil-painting, using mineral
colours however instead of oil, thereby forming a somewhat more durable cement.
For example. By the use of zinc-oxide and chloride of zinc solution, in the pro-
portion of two parts of heated oxide to one of the solution (55° Beaumé) a paste
is formed, the material being mixed in a porcelain vessel. This paste is coloured
according to requirement with mineral colours and mixed in the hereinbefore stated
proportions with stony substances of suitable colour and polishing capacity, such
as Parian, Carrara marble, blue lapis lazuli &c.
The composition thus prepared, is then laid on the surface to be decorated, to
the required thickness, viz. about three millimetres. In some cases the surface
of the slab of stone may be chiselled or carved, and then inlaid with the decorating
composition.

page_text: 4. The engraving of new-designs-in-slabs or flat surfaces or the productions of
designs in relief, according to the herein described process or any modification or
similar applications of the said process, as and for the purposes described.
Dated this 6th day of May 1891.
HUGHES, SON & Co.,
38, Chancery Lane, London, W.C., Agents for the Applicant