Mixture and Process for Producing Artificial Marble and other Stone Imitations.
Year: 1893

page_text: Date of Application, 4th July, 1893-Accepted, 2nd Sept., 1893
COMPLETE SPECIFICATION.
Mixture and Process for Producing Artificial Marble and other
Stone Imitations.
I, ANTON TYPLT, Manager of 63 Baaderstrasse, Munich Germany, do hereby
declare the nature of my invention and in what manner the same is performed to be
particularly described and ascertained in and by the following statement :-
The present invention relates to the production of artificial marble and other
stones and consists in the peculiar kind of mixture, as also in the novel process
employed to obtain the object in view.
The materials employed are magnesia, chloride of magnesium solution, oxide of
zinc, marble dust and sand or waste stone. 100 parts by weight of magnesia are
mixed with a sufficient quantity of chloride of magnesium solution of a con-
sistency of 20-25° Baume to form a tolerably thin pulpy mass. The mixture is
then placed in a suitable mixing device and 20 parts by weight of oxide of zinc
and 50 parts Carrara marble dust added. The whole is then thoroughly well
mixed and immediately-i.e. before the same has hardened in any degree-worked
up as desired, any coloring matters, should such be required having been added
previously.
The plastic mass thus obtained is worked up or employed in the following
manner The same is coated onto a glass or other plate having a smooth polished
surface, with a brush and then allowed to become thoroughly hard, which takes
about 6 hours. The time required to harden may however be varied by varying
the amount of water added to the chloride of magnesium solution. The coating
may be of any desired thickness, as however the same is only designed to produce
a relief effect it should not be more than a few centimeters thick.
This first coating is then covered by a second coating in the form of a pulpy
mass, serving to increase the thickness of the former and consisting of magnesia
and sand or stone waste worked up with a solution of chloride of magnesium to a
pulpy mass, this coating is then poured onto the hardened stone coating previously
described. The second coating does not dry so quickly as the first requiring about
48 hours. The proportions of this second mixture vary very considerably but the
following may be taken as an example :
50 parts by weight of magnesia,
10
"
"
99
25
"
"
"
of chloride of magnesium solution,
. of sand or stone etc.
As soon as the latter coating has hardened the stone slab is removed from the
polished surface and washed in pure water in order to remove any substances which
may not have been bound and to prevent the sweating of the artificial stone
subsequently. During the washing process care must be taken to prevent the
fingers from coming into contact with the surface of the stone as such contact
produces blots or stains after the stone has become dry.
The manufactures may be made to represent any kind of stone by employing
various colours necessary for this purpose.
The above mentioned proportions have been chosen on the grounds of extensive
experiments which have proved them to be necessary, in order to obtain a stone of
the requisite hardness without further treatment. Carrara marble is also most
advantageously employed on account of its rendering the stone of increased

page_text: 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:
A process for producing stone imitations in combination with a mixture of
certain proportions, consisting of 100 parts of magnesia, sufficient chloride of
magnesium solution of 20-25° Baumé consistency to form a thin pulpy mass,
20 parts oxide of zinc and 5 parts marble dust, said mixture being coated onto
a smooth surface, and after having thoroughly dried being covered with a second
coating consisting of magnesia, chloride of magnesium solution and sand or stone
waste, the whole being then allowed to dry and then washed in pure water for the
purpose substantially as described.
Dated this 4th day of July 1893
REGINALD W. BARKER,
Applicant's Agent.