Process for the Production of Grounds on Cotton in Dyeing or Printing with Azo Colouring Matters.
Year: 1899

page_text: Date of Application, 28th Dec., 1899
Complete Specification Left, 21st Aug., 1900-Accepted, 24th Nov.,
1900
Process for the Production of Grounds on Cotton in Dyeing or Printing
with Azo Colouring Matters.
I, THOMAS RICHARD SHILLITO, of 15, Tooks Court, London, E.C., Engineer
and Patent Agent, do hereby declare the nature of this invention--a communi-
cation to me from abroad by Messieurs John Rudolph Geigy & Co., of Basle,
Switzerland, Colour Manufacturers--to be as follows:-
As is known, in the production of most of the azo colours on the cotton fibre,
the addition of a mordant, as for instance, Turkey red oil, castor oil or olive
oil, soap, tragacanth, gelatine, or gum of various kinds is necessary to obtain
a ground of fine shade and satisfactory fastness.
My correspondents have found that as fast and even finer shades may be
obtained when a rosin soap made from colophony and an alkali is added to the
grounds of phenol, naphthols and their derivatives. The rosin soap has further
the great advantage of being much cheaper than the other mordants hitherto
employed.
EXAMPLE.
22 kilos. of B-naphthol are dissolved in hot water and 16 liters of caustic soda
lye of 40° Bé., then 70 liters of rosin soap are added and diluted to 1000 liters.
The fibre is impregnated in the known manner, dried and dyed in a solution of a
diazo colour or printed with a diazo colour, as for instance, the diazo compounds
of paranitraniline, naphthylamine, safranine, etcetera. The fibre may also be
mordanted first with the rosin soap and afterwards with the naphthol.
Dated this 28th day of December 1899.
THOMAS R. SHILLITO.
Process for the Production of Grounds on Cotton in Dyeing or Printing
with Azo Colouring Matters.!
I, THOMAS RICHARD SHILLITO, of 15, Tooks Court, London, E.C., Patent Agent,
do hereby declare the nature of this invention and in what manner the same
is to be performed a communication to me from abroad by Messieurs John
Rudolph Geigy & Co., of Basle, Switzerland, Colour Manufacturers—to be par-
ticularly described and ascertained in and by the following statement:-
As is known, in the production of most of the azo colours on the cotton fibre,
the addition of a mordant as for instance Turkey red oil, castor oil soap or olive

page_text: oil soap, tragacanth, gelatine or gum of various kinds, is necessary to obtain a
ground of a fine shade and satisfactory fastness.
My correspondents have now found that as fast and even finer shades may
be obtained when a rosin soap made from colophony and an alkali is added to the
grounds of phenol, naphthols and their derivatives. The rosin soap besides
has the great advantage of being much cheaper than the other mordants hitherto
employed.
EXAMPLE.
22 kilos. of B-naphthol are dissolved in hot water and 16 liters of caustic soda
lye of 40° Bé, then 70 liters of rosin soap (solution containing about 15 per cent.
of colophony) are added and diluted to 1000 liters. The fibre is impregnated in
the known manner, dried, and dyed in a solution of a diazo colour or printed
with a diazo colour, as for instance, the diazo compounds of paranitraniline,
naphthylamine, safranine, etcetera. The fibre may as well be mordanted first
with the rosin soap and afterwards with the naphthol.
Having now particularly described and ascertained the nature of said inven-
tion and in what manner the same is to be performed, as communicated to me
by my foreign correspondents, I declare that what I claim is:—
Process for the production of grounds of azo colours on the cotton fibre by
means of phenol, naphthols, and their derivatives, carried out either by previous
mordanting with or by a direct addition of rosin soap, substantially as described.
Dated this 21st day of August 1900.
THOMAS R. SHILLITO.
15, Tooks Court, London, E.C.