IMPROVEMENTS IN THE MANUFACTURE OF IMITATION MARBLE
Year: 1884

page_text: I AUGUSTO GUATTARI of 91 Shirland Gardens, Paddington, in the County of
Middlesex Engineer, do hereby declare the nature of the said invention for
"IMPROVEMENTS IN THE MANUFACTURE OF IMITATION MARBLE" to be as follows:-
This Invention relates to a process of manufacturing what may be termed
artificial black marble from the various varieties of gypsum specified in a previous
application dated 2nd February 1884, N° 2640, whereby the black color obtained is
not merely superficial but permeates the whole mass treated, and a product is
obtained in every way equal to Flanders marble.
• According to this process of manufacturing black marble, the carved or
sculptured objects of gypsum are not dehydrated in a stove but are immersed in a
hot preparation of bitumen of suitable strength. During this operation the
dehydration of the material under treatment is accomplished and the bitumen not
only penetrates the mass but fills all the pores and spaces evacuated by the water
which was contained in the material treated, a compact mass of a brilliant black
being obtained and of a hardness which is improved by time.
The same process is also applicable to the treatment of gypsum in the rough
mass and to pulverised gypsum designated' by the name of marmorite in my
previous application aforesaid.

page_text: "
I AUGUSTO GUATTARI of 91 Shirland Gardens Paddington, in the County of
Middlesex, Engineer do hereby declare the nature of the said invention for
"IMPROVEMENTS IN THE MANUFACTURE OF IMITATION MARBLE' 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 a process of manufacturing what may be termed
artificial black marble from the various varieties of gypsum specified in a previous
application for Letters Patent dated 2nd February 1884, N° 2640, whereby the
black color obtained is not merely superficial but permeates the whole mass treated,
and a product is obtained in every way equal to Flanders marble.
According to this process of manufacturing black marble, the carved or
sculptured objects of gypsum are not debydrated in a stove, as in the process
described in my aforesaid other application, but are immersed for a suitable length
of time in a hot preparation of bitumen of suitable strength. During this
operation the dehydration of the material under treatment is accomplished and the
bitumen not only penetrates the mass but fills all the pores and spaces evacuated
by the water which was contained in the material treated, a compact mass of a
brilliant black being obtained and of a hardness which is improved by time.
The same process is also applicable to the treatment of gypsum in the rough
mass and to pulverised gypsum designated by the name of "marmorite" in my
previous application aforesaid.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed I declare that what
I claim is
The herein described process of making imitation black marble from gypsum
whether carved or sculptured, or in the rough or pulverized, by impregnating the
same with bitumen substantially as specified.