Process for the Production of Artificial Marble.
Year: 1899

page_text: Date of Application, 13th Oct., 1899-Accepted, 2nd Dec., 1899
Process for the Production of Artificial Marble.
I, SALLY WEILL, of No. 10, Garten Strasse, St. Johann, in the Empire of
Germany, 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::-
The present invention relates to a process for the production of artificial marble
from substances or materials of small commercial value, the marble produced
thereby being equal to real marble as regards hardness as well as regards weather
resistability and the polish or surface lustre.
I will now proceed to describe the process more fully.
To 80% (by weight) of white English marble cement are added 15% of water
and 2% of glycerine and stirred together in such a manner that a viscid paste
is produced. To this paste is added up to 3% earth colouring matter of any
suitable kind in accordance with the kind of marble it is intended to produce,
the earth colouring matter having previously been moistened by the mixture of
15% of water and 2% of glycerine. The whole mixture is then intimately stirred
and the viscid material poured into moulds, pressed or stamped. After remain-
ing for 48 hours in the moulds, the casts are taken therefrom and dried on suit-
able racks or shelfs. If they are being air dried it requires about 4 weeks for
the perfect drying of the moulded pieces. This drying can however be effected
by employing artificial drying processes in any of the well known manners.
well dried moulded pieces are thereupon smoothed off by means of pumice-stone
and the surfaces are uniformly stopped. The moulded pieces thus treated are
again submitted to a drying process and smoothed off by means of a fine whet-
stone, the pores that might still be present having previously been stopped or
filled up and they are thereupon perfectly smoothed by means of a polishing
stone, preferably the so called black-stone.
The
A moulded piece prepared according to this process is to all appearance perfectly
equal to real marble. Any moistness still apparent can be removed by renewed
drying by means of air or artificial means. The perfectly dry moulded pieces are
then polished in the following manner. They are well saturated with olive-oil
and treated by wax polishing until the surfaces present a perfectly bright appear-
ance. The dry-polishing is effected in any well known and suitable manner by
means of Vienna-lime.
The addition of 3% of colouring matter can obviously be varied by reduction
or increase in accordance with the degree of coloration the final product is
intended to show.
I have found it advantageous to employ earth colours for the coloration of the
material.
For the production of monochromatic marble which is to be equal in hardness
to Gyenit, a mixture of 50% of cinder-dust or similar material, 35% of white
English marble cement, 12% of water, 2% of glycerine, 1% of colouring matter
(earth-colour) is employed; these substances being mixed together by means of
an agitator or stirrer, by manual labour or in any other suitable manner so as

page_text: to form a thick paste, which is pressed into metal moulds or stamped and is
thereupon treated in a manner similar to that" previously described.
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:
-
1) Process for the production of artificial marble consisting in adding to a
mixture composed of 80% of white English marble cement, 15% of water and
2% of glycerine, 3% of earth colouring matter of any suitable kind, the viscid
composition being thereupon poured, pressed or stamped into suitable moulds
and after being dried by natural or artificial means smoothed off and polished in
a manner similar to that of real marble.
2) Process for the production of monochromatic artificial marble consisting in
treating a composition of 50% of cinder dust or similar material, 35% of white
English marble cement, 12% of water and 2% of glycerine with an addition
of 1% of colouring matter in a manner substantially as set forth.
3) As a new article of manufacture artificial marble produced substantially as
described.
1000
B. REICHHOLD,
International Patent Office,
24, Luisen Strasse, Berlin, N.W., Germany,
Agent for the Applicant.