Improvements in or connected with the Manufacture of Fluorescent Soaps.
Year: 1894

page_text: COMPLETE SPECIFICATION.
Improvements in or connected with the Manufacture of
Fluorescent Soaps.
I, SIGMUND NEUMANN of Gottergasse, Budapest, in the Kingdom of Hungary,
Doctor of Philosophy, 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 relates to the production of fluorescent soaps whether coloured
or not.
Ordinary opaque or non-translucent soap is capable of taking up, during its
manufacture, fluorescent bodies, but such soaps do not exhibit in their finished
state the characteristics of fluorescence.
Instead of employing ordinary non-transparent or non-translucent soap for the
purpose of my invention, I take transparent soap in the fluid form or in a fluid
state of manufacture, and in this state I add thereto any suitable body which in
itself or in its solution is fluorescent and which does not lose its fluorescence in the
finished soap. I may also add to the fluid soap such colours soluble therein as may
be desired to produce a given tint or shade.
The fluorescent bodies which may employ by addition to the fluid transparent
soap, for producing the fluorescence, are for example:-Fluorescein-derivative,
eosin, phloxin, erythrosin, saffranin, esculin, rhodamin, azoresorcin, azoresorufin
and their derivatives. The fluorescent body is mixed with the fluid soap either in
the dry state or in solution by effective stirring. The soap may then be finished in
the usual manner.
If it be desired to impart to the soap a different colour to that which may be
given to it by the fluorescent body, the required colouring matter may be added
to it after the mixture therewith of the fluorescent body.
I have found that when using fluorescein or its derivatives for the purpose of
this invention, the fluorescent effect may be increased by the addition of ammonia
compounds and I may accordingly employ these substances in such cases.
It will be found that the proportions of the fluorescent colouring and ammoniacal
matters added to the soap may vary within wide limits, but for general practice
from one to two milligrams of each will suffice for each kilogram of the
fluid soap.
Any compound of ammonia which is soluble in water and which upon the addition
of caustic alkali produces free ammonia may be used, and in particular the chloride,
sulphate or carbonate.
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. As a new article of manufacture, fluorescent soap in which the fluorescent
effect is produced substantially as and by the means hereinbefore described.
2. The manufacture or production of fluorescent soap which consists essentially
in the addition to fluid transparent soap of suitable Aluorescent bodies with or
without the addition of colouring matters and with or without the addition of
ammonia and its compounds, substantially as hereinbefore described.
Dated this 22nd day of August A.D. 1894.
WILLIAM E. HEYS.