Year: 1886

page_text: Date of Application, 30th June, 1886.
Complete Left, 26th Mar., 1887.
Complete Accepted, 29th Apr., 1887
I ALFRED JULIUS BOULT of 323 High Holborn in the County of Middlesex,
Engineer do hereby declare the nature of this invention to be as follows:-
The process forming the object of the present invention consists essentially in
boiling together in a small quantity of water about a kilogram of cashoo and
25 grammes of tallow or other grease. The quantity of water is then increased to
about a hectoliter and the hides to be tanned are soaked in this bath.
In proportion to the action of the cashoo on the hide new quantities of cashoo and
grease are added to the bath so that the intensity of the bath is gradually increased
until the tanning is completed. The hides or skins are now placed in another bath
containing 25 grammes of divi-divi, boiled together with 10 grammes of grease per
hectoliter. The object of this bath is to perfect the tanning and to change the color of
the leather which the action of the cashoo has rendered too dark.
The leather is then rinsed in a cold water bath to free it from all foreign matter.
I am aware that cashoo has already been employed as tanning material but the
hides or skins treated with it were always too dry and too brittle besides remaining
porous. In the above described process the filling of the pores is effected and the
leather receives the desired suppleness resulting from the mixing of the cashoo with
grease and in this mixture lies the principle of the invention. Of the divi-divi the
same may be said; it has already been employed but not in conjunction with grease.
The acting matters are the tannin salts contained in the cashoo and the divi-divi in
combination with the grease. The tallow or grease may be replaced by linseed oil or
any other greasy matter possessing the same properties.
As regards the baths they are sometimes used tepid and allowed to cool gradually
and sometimes cold throughout the process according to the quality of the hides to be
treated.
1يمه
נ.י.מ
1
T
1000

page_text: A communication from Count VITOLD DE NYDPRÜCK, of Brussels, in the Kingdom
of Belgium.
I, ALFRED JULIUS BOULT of 323 High Holborn in the county of Middlesex,
Engineer, 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 process forming the object of the present invention consists essentially in
boiling together in a small quantity of water about a kilogram of catechu and
25 grammes of tallow or other grease. The quantity of water is then increased to
about a hectoliter and the hides to be tanned are soaked in this bath.
In proportion to the action of the catechu on the hide, new quantities of catechu
and grease are added to the bath, so that the intensity of the bath is gradually
increased until the tanning is completed. The hides or skins are now placed in
another bath containing 25 grammes of divi-divi, boiled together with 10 grammes of
grease per hectoliter. The object of this bath is to perfect the tanning and to
change the color of the leather which the action of the catechu has rendered too dark.
The leather is then rinsed in a cold water bath, to free it from all foreign matter.
I am aware that catechu has already been employed as tanning material, but the
hides or skins treated with it were always too dry and too brittle besides remaining
porous. In the above described process the filling of the pores is effected and the
leather receives the desired suppleness, resulting from the mixture of the catechu with
grease and in this mixture lies the principle of the invention. Of the divi-divi the
same may be said; it has already been employed but not in conjunction with grease.
The acting matters are the tanning salts contained in the catechu and the divi-divi in
combination with the grease. The tallow or grease may be replaced by linseed oil or
any other greasy matter possessing the same properties.
As regards the baths, they are sometimes used tepid and allowed to cool gradually,
and sometimes cold throughout the process according to the quality of the hides to be
treated.
It is understood that any other vegetable tanning material may be used in con-
junction with grease or tallow without deviating from the principle of the invention.
Having now particularly described and ascertained the nature of the said invention,
as communicated to me by my foreign correspondent, and in what manner the same
is to be performed, I declare that what I claim is :-
A tanning process consisting in immersing the hides to be tanned successively first
in a bath consisting of water catechu and animal grease previously boiled together
and second in a bath consisting of water divi-divi and animal grease previously boiled
together, substantially in the manner and proportions specified.
Dated this 26th day of March 1887