Year: 1886

page_text: Date of Application, 3rd Apr., 1886.
Complete Left, 3rd Jan., 1887.
Complete Accepted, 4th Feb., 1887.
We, THOMAS MAXWELL of Palmerston Villa, Govan, in the County of Lanark,
North Britain, Chemist and JOHN YOUNG of Kincaid House, Milton-of-Campsie, in the
County of Stirling, North Britain, Gentleman do hereby declare the nature of this
invention to be as follows:-
This Invention, which relates to improvements in the manufacture of colouring
matter, has reference to that class of colouring matter adapted for colouring fibrous
substances by the dry process.
The colouring matters used in the manufacture constituting the present Invention
are coloured native earths such for example as Raw Sienna or native earths which
assume a coloured state by calcining or by mechanical or chemical treatment, such for
example as Burnt Sienna. Inorganic coloured precipitates as well as lamp black may
also be used for the purposes of this Invention. The aforesaid coloured earth's pre-
cipitates or lamp black are, when necessary, reduced to a fine powder and charged with
a non-saponifiable or other oil.
The coloured earth precipitate or lamp black is mechanically mixed with the oil by
stirring or agitating the mixture until the whole mass is as homogeneous as possible.
The mixture is then sifted to free it from grit, the action at the same time furthering
the more equal diffusion of the oil amongst the coloured particles.
J. H. JOHNSON, DAY & JOHNSON,
115, St. Vincent Street, Glasgow,
Petitioners' Agents.

page_text: Improv anda
We, THOMAS MAXWELL of Woodside Avenue, Gallowflats, Rutherglen near
Glasgow formerly of Palmerston Villa, Govan in the County of Lanark North Britain
Chemist and JOHN YOUNG of No. 22 Belham Terrace, Glasgow, formerly of Kincaird
House, Milton-of-Campsie in the County of Stirling, North Britain, Gentleman do
hereby declare the nature of this invention and in what manner the same is to be
performed, to be particularly described and ascertained in and by the following
statement:
This Invention relates to improvements in the method of preparing colouring-
matter and has reference to the class of colouring matter adapted for colouring fibrous
substances by a process such as is described in the Specification of Letters Patent
No. 4299 dated the 22nd October 1879 the object of the present Invention being to
effect economy in the cost of and time necessitated for carrying the process into effect.
According to the present invention we dispense with the use of solutions of aniline
colours and so do away with the drying operation referred to in the Specification
No. 4299 of 1879.
We take native earths precipitates or deposits which have colour or can be caused to
assume colour by calcination or otherwise, and if these be not in a sufficiently fine condition
(which should be that of a practically impalpable powder) we grind or reduce the same
to the required powdered state. We then mix with the matter thus obtained the
quantity of nonsaponifiable oil which will be found necessary, according to the materials
treated; the mixture being effected in and by stirring or agitation, so that the whole
mass is rendered as homogeneous as possible.
We effect the mixture preferably in a vessel provided with stirrers, adding the oil
gradually to the other matter and continuing the stirring operation until the mixture
is complete.
.
The mixture which will then be in the state of powder is then sifted to free it from
grit, the action at the same time ensuring the proper diffusion of the oil amongst the
coloured particles.
The proportion of the non-saponifiable oil to that of coloured earth. or the like is
generally to every four parts by weight of coloured earth or the like about one part by
weight of oil, which may be mineral oil of commerce, but we prefer to use as heavy a
hydrocarbon oil as is practicable.
The colouring matter produced is preferably applied to the material by sprinkling it
upon the fibres whilst they are passing through the opening or scutching machine, but
it may be applied at any suitable stage preliminary to the spinning process.
Having now particularly described and ascertained the nature of our said invention
and in what manner the same is to be performed we declare that what we claim is―
The preparation and use of colouring matter by the direct treatment of coloured or
calcined earths or precipitates or deposits such as are above mentioned with non-
saponifiable oil, substantially as hereinbefore described.