An Improved Polish or Blacking for Boots and Shoes.
Year: 1895

page_text: Date of Application, 28th Feb., 1895-Accepted, 27th Apr., 1895
COMPLETE SPECIFICATION.
An Improved Polish or Blacking for Boots and Shoes.
1, Dr. ANTON ZEHRA, of Untere Amtshaus Gasse No. V/2, Vienna, in the
Kingdom of Austria, Manufacturing Chemist, 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 is based upon the observation that primary phosphate of lime,
free from carbon CaH (PO)2 when mixed with a concentrated solution of sugar
(sugar sirup, molasses, cane sugar, grape sugar), dextrine or vegetable gum or
rosin, and with any suitable oil or fatty substance, thoroughly stirred, applied to
leather in a thin layer, and rubbed in with a brush, imparts a beautiful shining
surface to the leather. The primary phosphate of lime is preferably produced
In the mixture itself by the decomposition of tri-phosphate of lime (apatite,
phosphorite or white-bone-ash) by means of mineral acids (sulphuric or hydrochloric
acid).
The product obtained may be utilized even while in a colourless condition, as a
polish for boots and shoes. It is, however, mainly intended for use with an
addition of suitable colouring matter, so that it may serve to colour the leather
while at the same time imparting to it the desired brilliancy.
The following is an illustrative example of the performance of the process of
manufacture of the improved polish or blacking for boots and shoes―
Decarbonized tri-phosphate of lime, either in the impure form of white bone-
ash, or in the condition of native apatite or phosphorite, on being reduced to a fine
powder, is mixed and stirred with molasses, sirup or any other pure or impure con-
centrated agneous solution of sugar (cane-sugar, grape-sugar or the like) dextrine,
or vegetable gum (gum-arabic, gum-senegal, etc.). To this mixture is added any
suitable vegetable, mineral, animal or artificial oil or fatty substance, the whole
being then once more thoroughly stirred; after which a thin jet of sulphuric or
hydrochloric acid, or a jet of each of the two acids in succession, is introduced into
the mixture, whereby the tri-phosphate of lime, which is contained in the raw
material used, is converted into primary phosphate of lime. Where it is desired to
colour the polish, suitable mineral, vegetable, animal or artificial colouring matter
may be superadded.
By mixing the ingredients named in the following proportions (for example),
satisfactory results will be obtained :-
46 kilogrammes of powdered white bone-ash,
92 kilogrammes of molasses or sugar sirup,
9 kilogrammes of oil or fat,
12 kilogrammes of concentrated solution of sulphuric acid,
10 kilogrammes of concentrated solution of hydro-chloric acid,
2 kilogrammes of mineral colouring matter, and
kilogramme of an "azo" dye-stuff.
The polish thus obtained is used in the same manner as ordinary blacking; it is
diluted in water, and a thin layer thereof is applied to the boot or shoe with an
ordinary but quite clean soft brush; alter which the boot or shoo is rubbed with
another ("shining") brush, which should also be perfectly clean, until its surface
acquires the requisite heilliana
By mixing the ingredients named in the following proportions (for example),
Batisfactory results will be obtained :-
46 kilogrammes of powdered white bone-ash,
92 kilogrammes of molasses or sugar sirup,
9 kilogrammes of oil or fat,
12 kilogrammes of concentrated solution of sulphuric acid,
10 kilogrammes of concentrated solution of hydro-chloric acid,
2 kilogrammes of mineral colouring matter, and
kilogramme of au
66 azo" dye-stuff.
The polish thus obtained is used in the same manner as ordinary blacking; it is
diluted in water, and a thin layer thereof is applied to the boot or shoe with an
ordinary but quite clean soft brush; alter which the boot or shoo is rubbed with
another ("shining") brush, which should also be perfectly clean, until its surface
acquires the requisite brilliancy. TL
ory short time, the iustre once
imparted being long retained, while a beautiful, full and deep colour is at the-same

page_text: time given to the leather. As in the case of ordinary blacking, the brilliancy may
be rendered still more durable by brushing the shoes or boots once over again,
some time after first cleaning them. Any mud adhering to the boots or shoes must
first be removed in the usual way by means of a mud brush; or, when very dirty,
the boots etc: may be wiped with a wet cloth or sponge.
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 I
claim is :-
·
1. A polish or blacking for boots and shoes, consisting of decarbonized primary
phosphate of lime, oil or a fatty substance and concentrated solutions containing
Bugar, dextrine or vegetable gum, with or without the admixture of colouring
matter.
2. The process of manufacture of the polish or blacking for boots and shoes
as claimed in the first claim; such process consisting in mixing and stirring tri-
phosphate of lime (apatite, phosphorite, or white bone-ash) with a concentrated
solution containing sugar (molasses, sirup, cane-sugar or grape-sugar), dextrine or
vegetable gum, and with animal, vegetable, mineral or artificial oil or fat; treating
the mixture with a concentrated solution of a mineral acid (sulphuric acid or
hydrochloric acid); and, if desired, superadding to the same an adequate amount of
mineral, animal, vegetable or artificial colouring matter.
Dated this 23rd day of February 1895.
MARKS & CLERK,
18, Southampton Buildings, London, W.C., and
13, Temple Street, Birmingham, Agents for the Applicant.