NEW OR IMPROVED VARNISH OR SIZE
Year: 1885

page_text: I, WILLIAM MACRONE, of 25 Jamaica Street, Glasgow, in the County of Lanark,
Letterpress Printer, do hereby declare the nature of said Invention for A NEW OR
IMPROVED VARNISH OR SIZE, and in what manner the same is to be performed, to
be particularly described and ascertained in and by the following statement, that is
to say :-
My invention relates to a new or improved varnish or size, suitable :
1. For sizing wall and other papers, fabrics and substances, either on one or on
both sides, preparatory to decorating the same with dry colours, and for developing
glaze upon the surface, without calendering or surface varnishing, whereby the said
papers, fabrics or substances are rendered washable without injury to the material
or colours, and impervious to moisture, infection and dust.
2. As a substitute for, or for mixing with varnishes at present in use, in the
manufacture of letter-press and lithographic printing inks, and for mixing with oil
paints to secure said inks and paints against skinning," while in bulk, also to
increase the permanency and heighten the brilliancy of coloured inks and paints.
3. For waterproofing paper, felt, and other fabrics.
The said varnish or size is composed of the following ingredients, and substan-
tially in or about the proportions hereinafter mentioned, that is to say:
Odourless seed oil (preferring those
oils with quick drying properties)
Resin -
Paraffine wax
Bees wax
Copal varnish
-
72 parts, by weight.
32
"
"
"
16
"
"
"
4
"
"
"
1 part,
"
رو
In manufacturing this size or varnish, the oil is heated until ebullition ceases,
then the resin, wax, and copal varnish, in the proportions before stated, are added.
After perfect incorporation, the viscid substance is poured out to cool. When this
substance assumes the consistency of a creamy curd, the varnish or size is ready for
use, and is employed cold, except in the case of paper; &c, to be waterproofed
throughout, when it is applied at a temperature of 212° F.,·
For waterproofing the finer kinds of paper, &c, the varnish. or size is used as
above manufactured, but for the courser kinds of paper, &c, I employ 32 parts, by
weight, of bitumen or asphalte, in addition to the ingredients above specified.

page_text: For treating fabrics, other than paper, the proportions of the ingredients would
vary slightly, for instance in treating closely woven cloth, the proportions of the
size would be about the same as those employed for treating paper, but as the
several degrees of softness or slackness of the material vary, so a corresponding
firmness of size would be required, in which case less oil and more of the resin and
wax would be used.
Any suitable machinery may be employed for applying this improved size or
varnish, but that recommended when the sizing and glazing operations are to
be effected, is shewn by me in the drawings accompanying my Complete Specifi-
cation, N°
of even date. The same remark holds good as regards apparatus
for applying the size for waterproofing purposes, but in this case I prefer to employ
the apparatus shewn by me in the drawings accompanying my Complete Specifi-
cation, N°
of even date.
Having now described my Invention and the manner in which the same may be
carried out, I claim
The improved varnish or size herein described, consisting of odourless seed oil
(heated till ebullition ceases) resin, paraffin wax, bees wax, and copal varnish, (to
which may be added asphalte or bitumen,) substantially in or about the proportions
specified, and for the purposes set forth.
ERNEST DE PASS,
Fel. Inst. P.A.,
68, Fleet Street, London,
Agent for the Petitioner.