IMPROVEMENTS IN OBTAINING VARIOUS COLORS ON COTTON. AND OTHER TEXTILE FIBRE
Year: 1880

page_text: LETTERS PATENT to Thomas Holliday and Robert Holliday, both of
Huddersfield, in the County of York, Manufacturing Chemists, for an
Invention of "IMPROVEMENTS IN OBTAINING VARIOUS COLORS ON COTTON.
AND OTHER TEXTILE FIBRE."
PROVISIONAL SPECIFICATION left by the said Thomas Holliday and
Robert Holliday at the Office of the Commissioners of Patents on the 6th
July 1880.
THOMAS HOLLIDAY and ROBERT HOLLIDAY, both of Huddersfield, in the County
of York, Manufacturing Chemists. "IMPROVEMENTS IN OBTAINING VARIOUS,
COLORS ON COTTON AND OTHER TEXTILE FIBRE."
The improvements consist in impregnating cotton or other textile fibre with
napthol and a diazo-compound separately or simultaneously, taking care that the
napthol is present with the diazo-compound and the fibre, when an alkali operates
to develop the color.
We employ for the purpose alpha or beta napthol, or a mixture of them; and
the diazo-compound we employ is the diazo-compound prepared or produced from
aniline, toluidine, xylidine, napthylamine, amido azo benzol, amido azo toluol, amido
azo xytol, amido azo napthaline, or a mixture of them, according to the particular
color or shade of color desired to be obtained.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Thomas Holliday and Robert Holliday in the Great Seal Patent
Office on the 5th January 1881.
.
THOMAS HOLLIDAY and ROBERT HOLLIDAY, both of Huddersfield, in the County
of York, Manufacturing Chemists. "IMPROVEMENTS IN OBTAINING VARIOUS
COLORS ON COTTON AND OTHER TEXTILE FIBRE."
The improvements consist in impregnating cotton or other textile fibre with
napthol and a diazo compound separately or simultaneously, taking care that the
napthol is present with the diazo compound and the fibre when an alkali operates
to produce or develop the color.
We employ for the purpose alpha or beta napthol, or a mixture of them (which
may be advantageously applied in solution or suspension); and the diazo compound
we employ is the diazo compound prepared or produced from aniline, toluidine,
xylidine, napthylamine, amido azo benzol, amido azo toluol, amido azo-xylol, or a
mixture of them, according to the particular color or shade of color desired to be
obtained, and which are already known to produce coloring matters soluble in
water when added to an alkaline solution of sulphonated napthol.
In the application of these matters on the fibre we find it convenient to adopt
such relative proportions of them. as will give about their relative chemical
equivalents at the moment of the development of the color by the action of an
alkali, which alkali should be present in equivalent proportion to or excess of the
acid that may be contained in the diazo compound, but such proportions may be
greatly varied. A good result may be obtained when the proportion of the napthol
on the fibre to such fibre is as 2 parts of napthol to 100 parts of fibre, and
the diazo compound and the alkali in relative equivalent proportion, as already
stated.
Having thus described our Invention, and means which we adopt in carrying
the same into effect, we would have it understood that what we claim is, the
obtaining various colors on cotton and other textile fibre by impregnating the said
fibre with napthol and a diazo compound, so as to produce an azo. color directly in
or upon the fibre, in manner substantially as described.
In witness whereof, I, the said Thomas Holliday, have hereunto set my
hand and seal, this Fourth day of January, in the year One thousand
eight hundred and eighty one.
. Witness,
ALFRED G. BROOKES,
59, Chancery Lane,
London.
THOMAS HOLLIDAY. (L.S.)