NEW OR IMPROVED PREPARATION TO BE APPLIED TO PAPERHANGINGS, TO GILDING AND TO VARIOUS OTHER SURFACES FOR THE PRESERVATION THEREOF
Year: 1884

page_text: PROVISIONAL SPECIFICATION.
I METFORD WARNER of Essex Road Islington in the County of Middlesex,
Paper Stainer do hereby declare the nature of the said Invention for A NEW
OR IMPROVED PREPARATION TO BE APPLIED TO PAPERHANGINGS, TO GILDING
AND TO VARIOUS OTHER SURFACES FOR THE PRESERVATION THEREOF to be as
follows:-
The Invention has for its object a new or improved preparation to be applied
to paper hangings, to gilding and to other surfaces for the preservation thereof, to
render the same washable and impervious to moisture.
For this purpose 1 employ solutions of either animal, fish or vegetable gelatino
in combination with the various compounds of the metal chromium such as the
peroxide, or chromic acid, and other of its salts more particularly the chromites
aud bi-chromates of potass and the potassa sulphate of chromnium commonly called
chrome alum.
The solution is to be made of any strength suitable to the particular use to
which it is to be applied and such solution is to be applied either mixed with the
colours used in the manufacture of paper hangings or by floating or brushing on
the solution after the paper-hanging is manufactured, or after such paper-hanging
has been hung on the walls.
The solution may also be floated or brushed over distempered walls in order to
render the same washable and impervious to moisture.
It is also suitable for the preservation of written documents, engravings, water
colour, chalk and pencil drawings and photographs from the deleterious influence
of damp and wet and for the preservation of surfaces coated with gold or silver leaf,
Dutch metal and brouze powders.

page_text: I METFORD WARNER of 64 Essex Road, Islington in the County of Middlesex
Paper Stainer do hereby declare the nature of the said Invention for A NEW
OR IMPROVED PREPARATION TO BE APPLIED TO PAPER HANGINGS, TO GILDING
AND TO VARIOUS OTHER SURFACES FOR THE PRESERVATION THEREOF and in
what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement:-
The Invention has for its object a new or improved preparation to be applied to
paper hangings, to gilding and to other surfaces for the preservation thereof, to
render the same washable and impervious to moisture.
For this purpose I employ solutions of either animal, fish or vegetable gelatine
in combination with the various compounds of the metal chromium, such as tho
peroxide, or chromic acid and other of its salts more particularly the chromates and
bi-chromates of potass and the potassa sulphate of chromium commonly called
chroine alum.
The solution is to be made of any strength suitable to the particular use to
which it is to be applied and such solution is to be applied either mixed with the
colors used in the manufacture of paper hangings or by floating or brushing on the
solution after the paperhanging is manufactured or after such paper hanging has
been hung on the walls.
The solution may also be floated or brushed over distempered walls in order to
render the same washable and impervious to moisture.
It is also suitable for the preservation of written documents, engravings, water
|_ color, chalk and pencil drawings and photographs from the deleterious influence of
damp and wet and for the preservation-of-surfaces-coated-with gold or silver leaf,
Dutch metal, and bronze powders.
The solution I find best adapted for rendering papers washable and for
protecting the golds from the action of gas and sulphurous or other fumes, is the
potassa sulphate of chromium commonly called chrome alum mixed with the
ordinary size used in a paper staining factory; other gelatinous substances can
however be successfully used but they are more expensive.
When applying the solution to the papers after the latter are printed, it is used
in various proportions of strength according to the different qualities of paper.
For machine printed papers I have advantageously used a solution containing
from 7 to 8 parts of paper stainers size in a boiling state, about 48 parts of hot
water and about 14 to 16 parts of saturated solution of chrome alum which latter
is gradually added to the other ingredients.
Hand printed papers having considerably more size in the printing colors than
those printed by machine only require a solution of about half the strength of size
say from 3 to parts of boiling size to about 48 parts of hot water with from 12
to 14 parts of chrome alum.
If the solution is gelatinous, which frequently occurs in cold weather, I use
it warm.
The solution may be applied to the paper in various ways.
Hand printed papers being all in from 8 to 24 yard lengths, the solution is
readily applied thereto by passing them through the ordinary sizing machine
having a pan with narrow slit at the bottom through which the solution passes on
to the paper.
Machine printed papers being in long lengths or coils the solution is readily
applied thereto by floating them over or drawing them through the liquid in a

page_text: long trough the motion being regulated by machinery, or the coils of paper may
be coated with the solution in a similar manner to that in which papers aro
sized prior to varnishing, in the paper hanging printing or grounding machine.
Other methods of applying the solution may however be employed.
The chrome alum may be employed mixed with the ordinary sized colors used
for printing paper hangings, in the proportion of about 2 parts of chrome alum to
about 8 parts of size.
As light colored papers are tinged by the blue color of the solution, I use for
them (when necessary) a weaker solution of the chrome alum adding a mixturo of
chromic acid of the strength of about 2 grains of chromic acid to 24 ounces of water
or a small quantity of saturated solution of chromate or bi-chromate of potass.
For protecting gilt frames I use a weak solution of chromic acid with concentrated
size (Cannon's) such as is used by gilders mixed with water.
The solution can be applied by the ordinary sizing brush or roller to any papers
after they are hung on the walls or for rendering lining papers impervious to
moisture.
When used for protecting photographs, water color drawings, engravings, pencil
and chalk drawings written documents on paper or parchment from damp, a weaker
solution of the chrome alum is used with the best quality of size or gelatine and tho
articles are floated on or passed through the solution.
The solution may also be applied to cloths, calico and linen fabrics.
I would here remark that instead of applying the chromic compound and the
gelatine as a single solution, such materials may be applied in separate solutions;
that is to say, I coat the paper or articles to be protected first with a solution of
gelatine or size and then when dry I pass such articles over or through a strong
solution of chrome alum or other compound of chromium which produces the same
result as when such materials are fixed before application.
Having now particularly described and ascertained the nature of my said
Invention and in what manner the same is to be performed, I declare that what
I claim is
The employment of a solution of a compound of the metal chromium in
combination with a solution of either animal, fish or vegetable gelatine for tho
preservation of paper hangings, gilding and various other surfaces and applied
thereto as a single solution, or as two separate solutions substantially as herein
described.