Improvements in or relating to the Mordanting of Fibrous Materials Preparatory to Dyeing such Materials.
Year: 1897

page_text: Date of Application, 17th Aug., 1897
Complete Specification Left, 24th Aug., 1897-Accepted, 23rd Oct., 1897
Improvements in or relating to the Mordanting of Fibrous Materials
Preparatory to Dyeing such Materials.
I, Dr. HEINRICH SEIDEL, of Wahringerstrasse 59 Vienna IX, Austria, do hereby
declare the nature of this invention to be as follows:-
This invention consists in improvements in or relating to the mordanting or
treating of fibrous substances, particularly sheep's wool, preparatory to dyeing
5 such material. According thereto in addition to, or with the usual metallic
compounds, there is employed instead of the organic substances heretofore
employed such as tartar, tartar preparations, and lactic acid, that substance which
as is well known, is capable of being salted out in a well known manner by means
of salts of the alkaline metals, or metals of the alkaline earths, from the lyes of
sulphite cellulose stuff.
In accordance with the said invention, the preliminary mordanting of fibrous
materials with the said substance can be effected without a previous separation
of the said substance from the sulphite lye, by adding the said lye, either as such
or in a concentrated state to the mordanting liquid which contains the said
5 metallic salts. Or the lye, before being used for mordanting, can be deprived of
colour and purified in any known way, that is to say, be freed from the
compounds of lime and magnesia present therein; or, the residue obtained by
evaporating the crude or purified sulphite lye to dryness, can be employed together
with the metallic salts which serve for mordanting.
The following example may be given by way of explaining my invention:-
Well wetted sheeps' wool is placed in a mordanting bath which contains in
solution, at the ordinary temperature, the usual amount of potassium
bichromate Cr,OK, with or without an addition of sulphuric acid, and a
quantity (varying according to the depth of the ultimate desired shade of colour)
of the substance (5 to 10 %), that is capable of being salted out of sulphite lye, or
the corresponding quantity of concentrated or unconcentrated, purified or not
purified lye, or of the dry residue obtained by evaporating the lye to dryness.
The mordanting bath is heated slowly to boiling point, and is maintained at this
point for about 5/4 hours. Wool mordanted in this manner is dyed in the same
way as wool which has been mordanted by means of tartar, tartar substitute,"
or lactic acid and bichromate of potash.
Dated this 17th day of August. 1897
66
Improvements in or relating to the Mordanting of Fibrous Materials
Preparatory to Dyeing such Materials.
I, Dr. HEINRICH SEIDEL, of Wahringerstrasse 59 Vienna I, Austria, do hereby
declare the nature of this invention and in what manner the same is to be
Price 8d1

page_text: performed to be particularly described and ascertained in and by the following
statement:—
This invention consists in improvements in or relating to the mordanting or
treating of fibrous substances, particularly sheep's wool, preparatory to dyeing
such material. According thereto in addition to, or with the usual metallic
compounds, there is employed instead of the organic substances heretofore
employed such as tartar, tartar preparations, and lactic acid, that substance which
as is well known, is capable of being salted out in a well known manner by means
of salts of the alkaline metals, or metals of the alkaline earths, from the lyes of
sulphite cellulose stuff.
In accordance with the said invention, the preliminary mordanting of fibrous
materials with the said substance can however also be effected without a previous
separation of the said substance from the sulphite lye, by adding the said lye,
either as such, or in a concentrated state to the mordanting liquid which contains
the said metallic salts. Or the lye, before being used for mordanting, can be
deprived of colour and purified in any known way, that is to say, be freed from the
compounds of lime and magnesia present therein; or, the residue obtained by
evaporating the crude or purified sulphite lye to dryness, can be employed together
with the metallic salts which serve for mordanting.
The following example may be given by way of explaining my invention:-
Well wetted sheeps' wool is placed in a mordanting bath which contains in
solution, at the ordinary temperature, the usual amount of potassium
bichromate Cr₂O,K₂, with or without an addition of sulphuric acid, and a
quantity (varying according to the depth of the ultimate desired shade of colour)
of the substance (5 to 10 %), that is capable of being salted out of sulphite lye, or
the corresponding quantity of concentrated or unconcentrated, purified or not
purified lye, or of the dry residue obtained by evaporating the lye to dryness.
The mordanting bath is heated slowly to boiling point, and is maintained at this
point for about an hour and a quarter.
Wool mordanted in this manner is dyed in the same way as wool which has
been mordanted by means of tartar, tartar substitute," or lactic acid and
bichromate of potash.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed I declare that what I
claim is:-
The herein described improvement in the mordanting fibrous substances such
as wool, for dyeing purposes, according to which instead of the mordants at
present generally employed, such as tartar, "tartar preparation," and lactic acid,
there is employed in conjunction with metallic salts and with or without addition
of sulphuric acid, the substance that is capable of being salted out from sulphite
lye, or the lye itself, or the residue obtained by evaporating the lye to dryness as
set forth.
F. WISE HOWORTH,
46, Lincoln's Inn Fields, London, W.C., Agent for the Applicant.