Improvements in the Production of Marbled Surfaces on Glass or the like.
Year: 1898

page_text: Date of Application, 15th Nov., 1898
Complete Specification Left, 14th Aug., 1899-Accepted, 15th Nov., 1899
PROVISIONAL SPECIFICATION.
Improvements in the Production of Marbled Surfaces on Glass or
the like.
We, DANIEL LAFFAN, of 40, Upper Sackville Street, Dublin, in the County of
Dublin, Bookbinder, and CITARLES JAMES BURY, of 99, North King Street, Dublin,
aforesaid, Merchant, do hereby declare the nature of this invention to be as
follows:-
This invention relates to the production of marbled surfaces on glass or the
like and has for its object to produce at a low price an imitation or painted marble.
Hitherto this marbling has generally been effected by painting with a brush and
depends for its effectiveness upon the skill or talent of the operator.
By our invention however we employ certain chemicals the use of which in the
manner to be described will produce a marbled surface which closely resembles
natural marble, and which can be done if desired on a full sized sheet of glass
and afterwards cut up to any required size.
In carrying the invention into effect, the sheet to be marbled is first prepared
to resist moisture by washing over the surface with the following solution, one
gallon of boiling water, one lb. of resin, 2 ounces ammonia boiled with 2 ounces
concentrated or powder size and alum. When this solution is dry on the glass,
one of the colours, say for example the blue, is then thrown on to the glass by
a coarse brush, and over same another colour is thrown or distributed, the lightest
colour to be the last used. In order to disperse these colours, and form veins in
imitation of marble a mixture of 2½, fluid ounces of spirit of turpentine, to one
gallon of boiling water is sprinkled on the sheet of glass, which is moved up and
down to allow the colours to blend together, and produce the required marbled or
veined surface. The surface is then allowed to dry.
When all the required patterns are struck and perfectly dry, a coating of whit-
ing and size, mixed to the consistence of paint, is brushed over the colours on the
sheet of glass, and when this coating is dry it is again coated over with Brunswick
black.
То prepare the pigments for the above, the following ingredients may be used,
these recipes however being given purely by way of example.
Blue. This may be made by dissolving two of Chinese blue in 1 gallon of boil-
ing water, 2 oz. of size, 2 lbs. of rolled whiting or Paris white, and 2 oz. oxalic
acid. Black may be prepared with 1 lb. of lamp black, 1 lb. drop black, ½, oz.
indigo blue, all to be ground together in a paint mill, 2 oz. of size, gallon of
water. Red, by 1 lb. vermilion, 1 lb. Derby red, 1 oz. size, to 1 quart water.
To this and all bright colours 2, fluid oz. of methylated spirit may be added.
Brown is made from Brunswick green, this pigment when calcined turning to a
rich brown, and different shades can be added by adding red chalk or orange
lead. Yellow, 1 oz. gamboge, 1 pint methylated spirit, 1 lb. flake white,

page_text: In giving the above proportions and ingredients however, we wish it to be
understood that we do not confine ourselves thereto, as they may be varied to suit
circumstances or the peculiar requirements of each individual case.
Dated this 14th day of November 1898.

page_text: To prepare the pigments the following ingredients may be used, these receipts
being given purely by way of example.-
Blue. This may be made by dissolving 2 oz. of Chinese blue in } gallon of
boiling water, 2 oz. size, 2 lb. rolled whiting or Paris white and 2 oz. of oxalic acid.
Black. May be prepared with 1 lb. of lamp black, 1 lb. drop black, oz. indigo
blue, all to be ground together in a paint mill, 2 oz. size, gallon of water.
Red by 1 lb. vermilion, 1 lb. Derby red, 1 oz. size to 1 quart of water. To this
and all bright colours 2 fluid oz. of methylated spirit may be added.
Brown is made from Brunswick green, this pigment when calcined turning
to a rich brown and different shades can be added by adding red chalk or orange
lead.
Yellow. 1 oz. gamboge, 1 pint methylated spirit, 1 lb. flake white.
In giving the above proportions and ingredients however we wish it to be
understood that we do not confine ourselves thereto, as they may be varied to
suit all circumstances or the peculiar requirements of each individual case.
As to the substances named any other substance producing a like result may
be used.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed, we declare that what
we claim is: -
1. The process for producing marbled surfaces on glass, which consists in first
treating the surface of the glass so as to resist moisture and lessen its smoothness,
then applying the various colours consecutively (the lightest shade being applied
last) by throwing them on with a brush sponge or the like then applying a thin
coating consisting of a mixture of white lead, terebene, and spirits of turpentine
to bring all the colours vividly out, and finally when dry, applying thick separate
coatings of whiting and size, and of Brunswick black or gas tar, substantially
as described.
2. The use and combination of the various ingredients for producing a marbled
surface on glass or the like substantially as described.
WM. P. THOMPSON & Co.,
Patent Agents, of Liverpool, Manchester, Birmingham, and London.