Improvements in Fixing Metallic Mordants on Fibres and Fabrics.
Year: 1896

page_text: This Print is in accordance with the Original Specification as it stands after
Amendment (under Section 11 of the Patents, &c. Act, 1883) as required by
the decision of the Chief Examiner of the 29th day of June 1897.
PROVISIONAL SPECIFICATION.
Improvements in Fixing Metallic Mordants on Fibres and
Fabrics.
ARTHUR ASHWORTH, Fernhill Chemical Works, Bury, Chemical Manufacturer,
do hereby declare the nature of this invention to be as follows:-
The fixation of metallic mordants on fibres and fabrics has been for a long time
the object of chemical research. It can hitherto only be achieved by passing the
goods through a solution of the metallic salts, drying the saturated goods and
either steaming them or treating them with the so called dunging agents as
phosphates, arseniates, alkali carbonates, chalk, ammonia etc. I have however
discovered a new method which renders the steaming or dunging unnecessary and
produces fixed metallic mordants on the fibre. The method I have discovered is as
follows:-
If two metallic salts are dissolved, of which one is easily decomposable and
contains a volatile acid, whilst the other acid combined with the second metal is
more powerful and capable of expelling the weaker one and if goods are passed
through such a solution the metallic mordants will be found to be fixed after
dyeing, in preference with hot air and washing in hot water.
The following examples will illustrate my method of working
Example 1-100 parts bisulphite of iron 18° Tw. and 50 parts muriate of chrome
320 Tw. are mixed together, the cloth or fibre is passed through until it is saturated,
dried, preferably in hot air, washed in hot water at about 90-95° C. and dried.
The mordants will be found to be fixed without the aid of further dunging or
steaming and the fibre or fabric is ready for use.
The same process as described in Example 1. applies also to the following
examples:-
Example 2.-100 parts bisulphite of iron 18° Tw. and 100 parts of 1% solution
of bichromate of soda.
Example 3.-100 parts acetate of alumina 20° Tw. and 50 parts muriate of iron
20° Tw.
Example 4-100 parts chloride of alumina 23° Tw. and 100 parts bisulphite of
soda 750 Tw.
Example 5.-100 parts muriate of chrome 320 Tw, and 100 parts bisulphite of
soda 750 Tw.
Example 6.-100 parts 10 % solution of stannous chloride and 100 parts
bisulphite of alumina 26° Tw.
According to the effect to be produced, the proportions may be varied as well
as the salts of the metallic mordants and I do not confine myself to the
[Prize 81

page_text: proportions and quantities above given. Also three or more metallic mordants
may be fixed in the same way upon the same principle as above described. Some
of the metallic mordants possess the property of producing shades upon the
fabric or fibre and may be used without any further treatment as colours
themselves.
Dotad this Thind der of March 1800
Improvements in Fixing Metallic Mordants on Fibres and
Fabrics.
ARTHUR ASHWORTII, Fernhill Chemical Works, Bury, Chemical Manufacturer,
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:-
The fixation of metallic mordants on fibres and fabrics has been for a long
time the object of chemical research. It can hitherto only be achieved by passing
goods of vegetable origin, through a solution of the metallic salts, drying the
saturated goods and either steaming them or treating them with the so called
dunging agents as phosphates, arseniates, alkali carbonates, chalk, ammonia etc.
whilst the mordanting of animal fibres requires a lengthy process and is often of
unsatisfactory nature."
I have, however, discovered a new method rendering the steaming or dunging
process used with vegetable fibres unnecessary, simplifying also the mordanting of
animal fibres, and producing fixed metallic mordants on the fibres. The method I
have discovered is as follows:-
2
Two metallic salts, both or one of them containing a metallic mordant or
consisting of a salt capable of conversion into a metallic mordant, are selected in
such a way that, if one of the salts only belongs to the class of metallic mordanting
agents, it must be easily decomposable and contain an acid more powerful than the
one contained in the second salt the acid of which has to be volatile; or if both be 3
metallic mordanting agents, both must be decomposable and one of them must be
combined with a more powerful acid than the other, whilst the acid co.abined with
the latter must be volatile.
The following examples will illustrate my method of working:-
Example 1-100 parts of bisulphite of iron 18 Tw. and 50 parts muriate of 3
chrome 32 Tw. are mixed together, the cloth or fibre is passed through until it is
saturated, dried, preferably in hot air, washed in hot water at about 90 to
95 Centigrade and dried. The mordants will be found to be fixed without the aid
of further dunging or steaming and the fibre or fabric is ready for use.
The same process as described in Example 1. applies also to the following 4
Example 2-100 parts bisulphite of iron 18 Tw. and 100 parts 1% solution of
examples:-
bichromate of soda.
Example 3.-100 parts acetate of alumina 20 Tw. and 50 parts muriate of
iron 20 Tw.
4
Example 4-100 parts chloride of alumina 23 Tw. and 100 parts bisulphite of
soda 75 Tw.
Example 5.-100 parts muriate of chrome 32 Tw. and 100 parts bisulphite of
soda 75 Tw.
Example 6.-100 parts stannous chloride 10% solution and 100 parts bisulphite 5
of alumina 26 Tw.
&

page_text: According to the effect to be produced, the prportions may be varied as well as
the salts of the metallic mordants and I do not confine myself to the proportions
and quantities above given. Also three or more metallic mordants may be fixed
in the same way upon the same principle above described. The mordants fixed
on the fabrics or fibres by my process possess very little colour and I therefore
use them only as mordants and not as self colours.
What I claim as new is:-
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