IMPROVE- MENTS IN THE PREPARATION OF DYE COLORS FOR USE IN POLYCHROMATIC PRINTING
Year: 1881

page_text: LETTERS PATENT to William George White and Robert Alfred Albert White,
both of Crayford, in the County of Kent, for an Invention of "IMPROVE-
MENTS IN THE PREPARATION OF DYE COLORS FOR USE IN POLYCHROMATIC
PRINTING."
PROVISIONAL SPECIFICATION left by the said William George White and
Robert Alfred Albert White at the Office of the Commissioners of Patents
on the 24th May 1881.
WILLIAM GEORGE WHITE and ROBERT ALFRED ALBERT WHITE, both of
Crayford, in the County of Kent. "IMPROVEMENTS IN THE PREPARATION OF
DYE COLORS FOR USE IN POLYCHROMATIC PRINTING."
This Invention has for its object improvements in the preparation of dye colors
for use in polychromatic printing.
In the Specification of a former Patent, No. 2268, in the year 1876, processes
are described for producing a block for polychromatic printing. The materials
employed are pigments mixed with fatty matters forming compositions which can
be melted and poured in a liquid state into the positions which they are required
to occupy in the block, and which can be further shaped as required by paring or
cutting; so in producing the polychrome block each colored composition is in
succession cast and wrought to form until the block is complete.
Our present Invention relates to the preparation of aniline dyes and other like
soluble coloring matters for use, in the manner above set forth, in polychrome
printing blocks.
For this purpose we first dissolve the dye in a suitable solvent, such as methylated
spirit or water, and add a solution of gum-or albumen.
We place the mixture in trays in a heated chamber and evaporate to dryness.
The dye or color so treated and dried, we then finely grind or pulverize and mix
with fatty ingredients; the following are suitable :--
Sheep's fat
Bleached beeswax
Sperm wax
Paraffin
Venetian turpentine
Poppy or moss oil
Linseed oil
100 parts.
15
دو
دو
"
15
8
80
»
10
"
18
"
We sometimes mix china clay as well as gum or albumen with the dye colors
before combining them with the fatty ingredients.
We sometimes make use of pigment colors in the same composition with aniline
or other dye colors.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said William George White and Robert Alfred Albert White in the
Great Seal Patent Office on the 24th November 1881.
WILLIAM GEORGE WHITE and ROBERT ALFRED ALBERT WHITE, both of
Crayford, in the County of Kent. "IMPROVEMENTS IN THE PREPARATION OF
DYE COLORS FOR USE IN POLYCHROMATIC PRINTING."
This Invention has for its object improvements in the preparation of dye colors
for use in polychromatic printing.
In the Specification of a former Patent, No. 2268, in the year 1876, processes
are described for producing a block for polychromatic printing. The materials
employed are pigments mixed with fatty matters forming compositions which can
be melted and poured in a liquid state into the positions which they are required
to occupy in the block, and which can be further shaped as required by paring or
cutting; so in producing the polychromo block each colored composition is in
succession cast and wrought to form until the block is complete.
Our present Invention rolates to the preparation of aniline dyes and other like
soluble coloring matters for use, in the manner above set forth, in polychrome
printing blocks.
For this purpose we first dissolve the dye in a suitable solvent, such as
methylated spirit or water, and add a solution of guin or albumen.
We place the mixture in trays in a heated chamber and evaporate to dryness.
The dye or color so treated and dried we then finely grind or pulverize and mix
with fatty ingredients; the following are suitable :-
Sheep's fat
Bleached beeswax
Sperm wax.
Paraffin
Venetian turpentine
Poppy or moss oil
Linseed oil (boiled)
100 parts.
15
15
8
80
"
"}
"
">
10
18 "
We sometimes mix china clay as well as gum or albumen with the dye colors
before combining them with the fatty ingredients.
We sometimes make use of pigment colors in the same composition with aniline
or other dye colors.
We prefer to proceed as follows:-We dissolve the coloring matter in the
solvent, and add thereto well washed china clay and a solution of gum arabic or
like gum.
The proportions we use are,-
]
1 oz. of the dye color,
2 lbs. of washed china clay,

page_text: The color so prepared is then ready for use in the production of the printing
block for polychromic printing, and the printing is conducted as is usual in this
process, and after printing the finishing operations are those commonly employed
in the polychromic process—the grease is extracted from the fabric by means of
saw dust or like material saturated with naptha or benzine spirit or other solvent,
the goods are then steamed and afterwards washed, all of which are well known
and usual operations. What we claim is, the preparation of soluble or dye colors
for use in polychromic printing blocks, substantially as herein described.
In witness whereof, I, the said William George White, have hereunto set my
hand and seal, this Twenty fourth day of November, in the year of our
Lord One thousand eight hundred and eighty one.