An Improved Process of Coating and Tinting Glass Surfaces.
Year: 1890

page_text: Date of Application, 20th Feb., 1890
Complete Specification Left, 4th Nov., 1890-Accepted, 10th Jan., 1891
PROVISIONAL SPECIFICATION.
An Improved Process of Coating and Tinting Glass Surfaces.
CHARLES LEIGH 128 High Street Homerton E. Artist do hereby declare the
nature of this invention to be as follows :―
To coat and tint glass, I roughen or grind the surface to be so treated. Then I
apply a coating consisting of suitable gums and a solvent preferably one of fusil oil.
Then coloring the said coat and finding the colors on it by any of the well known
mordants such as chloride of tin acetate of alumina tanin etc. When I use alcoholic
solutions such mordants can be entirely dispensed with the coated surface can
without further treatment be ornamented or painted upon in the usual way.
Dated this 28th day of February 1890.
COMPLETE SPECIFICATION.
An Improved Process of Coating and Tinting Glass Surfaces.
I, CHARLES LEIGH of 128 High Street, Homerton, in the County of Middlesex,
Artist, 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 :-
This invention relates to a process of coating and tinting glass surfaces for the
reception of paintings or other decorations. Although any glass surface may be
treated I have found that my process is particularly applicable to opal glass which
beretofore so far as I am aware has never been tinted, and any colour applied to its
surface has had to be burnt in.
In carrying out my process I roughen the surface of the glass to be treated by
grinding or in any other suitable way. I then apply the coating consisting of
suitable gums and a solvent preferably fusil oil. Any suitable colours are then
applied to the coat and are fixed on by any of the well known mordants such as
chloride of tin, acetate of alumina, tannin and the like. When 1 employ alcoholic
solutions these mordants can be entirely dispensed with. I have found that a
solution formed of the following ingredients gives satisfactory results and for this
purpose I dissolve 3 ounces of shellac; 1 ounces of sandarac; 1½ ounces of mastic;
1 ounces of benzoin, in 1 pints of alcohol. I then add 14 ounces of Venetian
turpentine and after the whole has dissolved the solution is filtered and an aniline dye
either vegetable, mineral or other dye, but preferably vegetable, soluble in alcohol
may be added.
I have also found that four parts of shellac to one part of borax dissolved in boiling
water will make an excellent coating.
Good results may also be obtained if one part of shellac (or any other gum soluble
in alcohol) dissolved in four parts of alcohol be applied to the surface and immersed
in a solution of aniline dissolved in boiling water with any of the well known mordants.
The coating can be applied to glass by a brush rag or other suitable means or it may
be floated upon the glass or the latter may be dipped or immersed in the coating
solution.
By means such as described I am able to produce a tinted opal glass of any shade
of colour which will not only keep its colour and remain unaffected by atmospheric
changes but is also capable of being washed without in any way damaging or
affecting it.
Although I prefer to employ the different ingredients in substantially the proportions

page_text: describ, still I wish it to be understood that 1 in no way limit myself, and that I
am at liberty to alter them as I may see occasion to do so.
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 :―
1. The method of obtaining an opal glass without firing a tinted surface in any
shade substantially as specified.
2. The employment of shellac (or other gum soluble in alcohol) dissolved in alcohol
to which is added an aniline dye for coating and tinting glass surfaces substantially as
specified.
3. Coating and tinting glass surfaces by a solution preferably in the proportion of
3 ounces of shellac, 1 ounces of sandarac, 1 ounces of mastic, 1 of benzoin, dissolved
in 1 pints of alcohol, to which is added 1 ounces of Venetian turpentine and an
aniline dye substantially as and for the purposes set forth.
4. The coating, and tinting of opal and other glass surfaces substantially as
specified.
D
ويد
1
1000
CHARLES LEIGH.
W. P. Thompson & Boult,
Agents for the Applicant.