Improvements in and relating to Dyeing and Printing, specially applicable to Woollen Piece Goods and Yarns.
Year: 1892

page_text: Date of Application, 20th Oct., 1892
Complete Specification Left, 15th July, 1893—Accepted, 2nd Sept., 1893
PROVISIONAL SPECIFICATION.
Improvements in and relating to Dyeing and Printing, specially
applicable to Woollen Piece Goods and Yarns.
I, WILLIAM BELL, of Glenfield, Paisley, Renfrewshire, Dyer, do hereby
declare the nature of my invention to be as follows:-
This invention has reference to and comprises a new or improved method or
process, and combination of chemicals or ingredients used therein for dyeing and
printing, and specially applicable to woollen piece goods and yarns.
The improved process is applicable for use with all vegetable colouring matter
that formerly required a mordant, and to cayanines anthracine and like alizarine
colours, and generally to all suitable colouring matter derived from coal tar.
By iny improvements the separate preliminary mordanting of the goods is
dispensed with, and the whole fixing of the colours is effected by one treatment
and in one dye-vat. In carrying this process into practice I use potassium, sodium,
or ammonium bichromate or chromate as a base in combination with an organic
acid preferably oxalic acid, the preferable proportions being one of the base to
three and a quarter of the acid. These substances are either previously mixed or
are added to the dye-vat along with the vegetable or alizarine colours to be used
when beginning the dyeing operations. The usual dyeing operations on the goods
can now be proceeded with, but without requiring a previous mordant, as has
heretofore been necessary.
Thated the 10th Outaban 1000
W. R. M. THOMSON & Co.,
96, Buchanan Street, Glasgow, Agents.
COMPLETE SPECIFICATION.
Improvements in and relating to Dyeing and Printing, specially
applicable to Woollen Piece Goods and Yarns.
I, WILLIAM BELL, of Glenfield, Paisley, Renfrewshire, Dyer, do hereby
declare the nature of my invention, and in what manner the same is to be
performed to be particularly described and ascertained in and by the following
statement in writing, that is to say :-
This invention has reference to and comprises a new or improved method or
process, and combination of chemicals or ingredients used therein for dyeing and
printing, and specially applicable to woollen piece goods and yarns.
The improved process is applicable for use with all vegetable colouring matter
that formerly required a mordant, and to cayanines, anthracine, and like alizarine
colours, and generally to all suitable colouring matter derived from coal tar.
By my improvements the separate preliminary mordanting of the goods is
dispensed with, and the whole fixing of the colours is effected by one treatment and
in one dye-vat. In carrying this process into practice I use potassium, sodium, or
ammonium bichronate or chromate as a base in conjunction or combination with an
organic acid preferably oxalic acid, the preferable proportions being one of the base
to three and one half of the acid. These substances are either previously mixed,
or are added to the dye-vat along with the vegetable or alizarine colours to be used
when beginning the dyeing operations. I preferably however mix the base and
acid substances in the proportions stated in a ground form when I find they
combine to form a solidified compound; but they may be mixed in a liquid state;
and the colouring matters may also be combined with these to form a single
Price 8/1

page_text: compound for adding to the bath or vat. The usual dyeing operations on the goods
can then be proceeded with, but without requiring a previous mordant, as has
heretofore been necessary.
For printing, the same procedure would be adopted, the base and acid being added
to the colour vats.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what 1
claim is
The improved method or process of dyeing or printing fabrics, yarns, and the
like, consisting in adding to the dye-vat of vegetable alizarine or other suitable
colours derived from coal tar, potassium, sodium, or ammonium bichromate or
chromate, and an organic acid, whereby the colours will be fixed without the goods
requiring a previous mordant, substantially as set forth.
W. R. M. THOMSON & Co.,
96, Buchanan Street, Glasgow, Agents..