IMPROVED PREPARATIONS OF MATERIALS FOR FACILITATING THE PREPARATION OF WHITEWASH AND DISTENDED
Year: 1882

page_text: LETTERS PATENT to James Ibbertson Fordham, of Shoreditch, in the County
of Middlesex, Varnish Maker, for an Invention of "IMPROVED PREPARATIONS
OF MATERIALS FOR FACILITATING THE PREPARATION OF WHITEWASH AND
DISTENDED "
PROVISIONAL SPECIFICATION left by the said James Ibbertson Fordham
at the Office of the Commissioners of Patents on the 6th January 1882.
"
JAMES IBBERTSON FORDHAM of Shoreditch in the County of Middlesex Varnish
Maker. IMPROVED PREPARATIONS OF MATERIALS FOR FACILITATING
PREPARATION OF WHITEWASHI AND DISTEMPER."
THE
My Invention consists of the preparations of materials hereinafter described the
said preparations being in the form of dry powders and requiring only the addition
of water to convert them into whitewash or distemper fit for immediate use.
In preparing a powder for whitewash I take a quantity of vellum size or other
suitable moist gelatinous matter and dissolve it by heat and add to it blue verditer
and green verditer in the proportion of about one part by weight of verditer to
twenty eight parts by weight of size. I then add to and mix with the said size
powdered whiting until the moisture contained in the size is absorbed by the
said whiting and the whole is brought to a state of powder. In this state the
preparation may be kept for an indefinite time. The quantity of whiting required
is from three to three and a half parts by weight to one part by weight of size.
When required whitewash suitable for immediate use may be made by mixing the
powder thus prepared with hot water in the proportion of about fourteen pounds
weight of powder to three quarts of water.
Instead of verditer any suitable antiseptic having no objectionable odour and
colour may be used.
In preparing a powder for distemper I add verditer to the size as bereinbefore

page_text: described and mix with the said size a quantity of a suitable pigment or pigments
sufficient to absorb the moisture of the size the said pigment or pigments being in
the form of powder. By mixing this preparation with hot water distemper fit for
use is at once produced.
If desired whitewash prepared as herein before described may be coloured or
tinted by adding suitable pigments thereto.
I do not limit myself to the proportions of materials hereinbefore stated.
By the use of the preparations of materials herein before described the process
of preparing whitewash and distemper is much facilitated and expedited and may
be readily performed by persons inexperienced in the said process.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said James Ibbertson Fordham in the Great Seal Patent Office on the
5th July 1882.
JAMES IBBERTSON FORDHAM of Shoreditch in the County of Middlesex Varnish
Maker. "IMPROVED PREPARATIONS OF MATERIALS FOR FACILITATING THE
PREPARATION OF WHITEWASH AND DISTEMPER."
My Invention consists of the preparations of materials hereinafter described the
said preparations being in the form of dry powders and requiring only the addition
of water to convert them into whitewash or distemper fit for immediate use.
In preparing a powder for whitewash I take a quantity of vellum size or other
suitable moist gelatinous matter and dissolve it by heat and add to it blue verditer
or green verditer in the proportion of about one part by weight of verditer to
twenty eight parts by weight of size. I then add to and mix with the said size
powdered whiting until the moisture contained in the size is absorbed by the said
whiting. The whole is then dried and when dry is in a state of powder. In this
state the preparation may be kept for an indefinite time. The quantity of whiting
required is from three to three and a half parts by weight to one part by weight
of size.
When required whitewash may be made by mixing the powder thus prepared
with hot water in the proportion of about fourteen pounds weight of powder to
three or four quarts of water. The mixture should be stirred for a few minutes
and when cold is fit for use.
Instead of verditer any suitable antiseptic may be used i.e. any antiseptic which
will not cause the mixture readily to absorb moisture from the atmosphere and
which has no objectionable odour and colour.
If desired a small quantity of ultramarine blue may be added to the dissolved
size in order to correct the yellowish tint of the whiting.
In preparing a powder for distemper I add verditer to the size as bereinbefore
described and mix with the said size a quantity of a suitable pigment or pigments
sufficient to absorb the moisture of the size, the said pigment or pigments being in
the form of powder.
Distemper is prepared from this powder by adding water thereto as hereinbefore
described with reference to the whitewash powder.
Instead of dissolved size dried and powdered glue or gelatine or other gelatinous
matter may be used. The proportions in which I prefer to use the materials in
this case are as follows:-
Powdered whiting 2 cwt.
Powdered glue or gelatine 14 lbs.
Ultramarine blue 1 oz.
Blue verditer or green verditer 1 oz.
These materials when thoroughly mixed together are fit for use in the same way
as the powder herein before described.
12
In preparing this powder I prefer to use the powdered glue or gelatinous
matter sold under the name of Cannon size" but it is not necessary that this
be used as any kind of glue or gelatine or other gelatinous matter in powder is
suitable for the purpose.
In order to reduce glue or gelatine or other gelatinous matter to powder it is
necessary to expose it to a moderate and gradually increasing temperature (say
from nighty to about one hundred and fante Jarmann
41

page_text: of being readily reduced to powder. It may then be ground under edge runners
or in any suitable mill such as a coffee mill.
In cases where the whitewash is not required to be kept for any considerable
time the blue verditer or green verditer or other antiseptic may be dispensed
with.
If desired whitewash prepared as herein before described may be coloured or
tinted by adding suitable pigments thereto.
I do not limit myself to the proportions of materials herein before stated.
By the use of the preparations of materials herein before described the process of
preparing whitewash and distemper is much facilitated and expedited and may be
readily performed by persons inexperienced in the said process.
Having thus described the nature of my Invention and the manner in which it
is to be performed, I wish it to be understood that I do not limit myself to the
proportions of the materials herein before stated as they may be considerably
varied without departing from the nature of my Invention but I claim as my
Invention of "Improved Preparations of Materials for Facilitating the Preparation
of Whitewash and Distemper."
First A preparation consisting essentially of size, glue, gelatine or other
gelatinous matter and whiting in powder the said materials being mixed together
in such proportions that whitewash or distemper may be produced by the addition
of water to the said powder.
Secondly-A preparation consisting of glue, gelatine or other gelatinous. matter
and whiting in powder and blue verditer or green verditer or other suitable
antiseptic with or without colouring matter the gelatinous matter and whiting
being in such proportions that whitewash or distemper may be produced by the
addition of water to the said preparation.
In witness whereof I the said James Ibbertson Fordham have hereunto set
my hand and seal this First day of July, in the year of our Lord One
thousand eight hundred and eighty two.