Improvements in the Treatment of Marble and similar Stone.
Year: 1896

page_text: Date of Application, 3rd Feb., 1896
Complete Specification Left, 2nd Nov., 1896-Accepted, 12th Dec., 1896
PROVISIONAL SPECIFICATION.
Improvements in the Treatment of Marble and similar Stone.
I, DIDIER JEAN JOSEPH FROMENT, of 12 Place de la Reine Schaerbeek,
Brussels, Belgium, Marble Mason, do hereby declare the nature of this invention
to be as follows:-
The improvements relate to novel modes of treating marbles and similar stones
by imparting to them artificial colors, tints, colored veins, and shades so that the
marble so treated can be subsequently cut and polished. The invention consists in
placing the marble to be treated in one or more baths of alcohol or ether mixed
with aniline or other organic coloring matter soluble in alcohol. The coloring
matter being carried by the alcohol into the interior of the stone. The bath may
be heated if desired. The quantity of coloring matter used and and the length of
time the marble is left in the bath depend on the effect to be produced and the
hardness of the marble treated.
After the above treatment the marble for the purpose of fixing the color is
placed in one or more baths of oil or other fatty matter, or layers of oil or fatty
matter may be applied to the marble all over or in parts only. The bath of oil or
fatty matter may also be heated if desired.
Dated this 3rd day of January 1896
HERBERT HADDAN & Co.,
18, Buckingham Street, Strand, London, W.C.,
Agents to the Applicant.
Improvements in the Treatment of Marble and similar Stone.
I, DIDIER JEAN JOSEPH FROMENT, of 12 Place de la Reine, Schaerbeck,
Brussels, Belgium, Marble Mason, 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 improvements relate to novel modes of treating marbles and similar stones
by imparting to them artificial colors, tints, colored veins, and shades so that the
marble so treated can be subsequently cut and polished. The invention consists in
placing the marble to be treated in one or more baths of alcohol or ether mixed
with aniline or other organic coloring matter soluble in alcohol. The coloring
matter being carried by the alcohol into the interior of the stone. The bath may
be heated if desired. The quantity of coloring matter used and the length of
time the marble is left in the bath depend on the effect to be produced and the
hardness of the marble treated.
After the above treatment the marble for the purpose of fixing the color is
placed in one or more baths of oil or other fatty matter, or layers of oil or fatty
matter may be applied to the marble all over or in parts only. The bath of oil or
fatty matter may also be heated if desired.
In carrying out my invention I have found that alcohol or ether has the best
affinity for the material of which marbles and similar stone are composed.
The alcohol and ether being at the same time the best solvents for the organic
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page_text: colors and especially for strong aniline dyes which they dissolve and hold sufficiently
so that they can penetrate into the masses extremely compact such as constitute
marbles etc., I use the organic colors, preferring the aniline dyes as coloring stuff.
In order that the absorption is made under the desired conditions, the stone must
be left some time in a bath composed of the before said stuffs, that means one or
several aniline colors, and alcohol or ether. In preference I use alcohol which
may be diluted with water.
The proportions of the stuffs composing the bath the time of leaving the stone
in the bath etc., depend upon the shades more or less dark which are to be obtained
as well as the nature of the stone which is to be treated.
The absorption is effected by means of capillarity. In consequence it is not
necessary to immerse completely the stone into the bath, but this complete
mmersion is made for certain kinds of marbles or stones.
For using this process, how the marbles or the other stones are affected by the
different dissolutions of colors etc., must be the subject of trials as also the kinds
of marble necessary to obtain a given effect.
The stones before immersing them in the bath, may be previously treated with
heat etc., in order to render them more apt to absorb the coloring stuff.
After the stone has received the tint or the veins wanted, it can be cut and
worked easily, equally it may be worked before putting it in the bath.
When it has left the bath of alcohol and aniline-colour, it is allowed to dry and
- then it can be immersed in a bath of oil or other fatty substance or a coating of
oil is applied upon the part of the piece to be polished. The fatty substance
penetrates to a certain depth into the marble and serves to fix the coloring stuff
and to give to the colored stone a certain transparency.
The polishing is done in the usual way.
The same stone may be left successively in the baths of the different colors in
order to obtain a greater variety of effects and the bath containing the stone may
be heated or boiled, for the purpose to accelerate the operation.
Having now particularly described and ascertained the nature of this inven
tion and in what manner the same is to be performed I declare that what I
claim is
1. The process for treating marble and other stones of irregular compact, hard
and polishable structure in order to give them any colored shades, veins, and spots,
consisting of leaving these stones in one or more baths composed of a solution of
alcohol or ether, made with one or more colors of aniline or other organic coloring
materials, the coloring material being carried by the alcohol into the interior of the
stone, where by means of the natural irregular structure of the mass it is distributed
in such an unequal manner that colored veins, spots or layers are produced or that
the principal mass of the stone is colored whilst parts of this mass remain more or
less free of coloring material and substantially as described.
:
2. In a process for coloring marble and other stones of irregular compact, hard
and polishable structure, as under Claim 1. a method for fixing the organic
coloring materials in the stone, consisting of leaving the colored stone in a bath of
oil or any other fat stuff or applying upon the stone layers of the same stuff.
3. In a process for coloring marble and other natural stones of irregular and
polishable structure, as under Claim 1 and 2, the method for accelerating the
absorption of the organic coloring materials and of the fat stuff by the stone in
treatment, consisting of heating or boiling the bath which contains the stone to be
treated.
Dated this 2nd day of November 1896.
HERBERT HADDAN & Co.,
18 Buckingham Street, Strand, London, W.C.,
Agents to Applicant.