An Improved Ink.
Year: 1890

page_text: Date of Application, 21st Oct., 1890-Accepted, 2nd May, 1891
COMPLETE
SPECIFICATION.
An Improved Ink.
We THOMAS WEMYSS JUST of 454 Collins Street Melbourne in the Colony of
Victoria Australia Hydraulic Engineer, ROBERT WEILER and OTTO HEIDEPRIEM
both of Salisbury Buildings corner of Bourke and Queen Streets Melbourne afore-
said Merchants 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 an ink specially prepared so as by its use to render
forgeries and criminal erasures additions or alterations easy of detection and
difficult to accomplish as the ink is not affected by the agency of acids alkalies etc.
and also to render written documents imperishable to the decay of time or other
circumstances such as damp mildew etc. which would militate against their permanency
and utility.
The peculiar chemical combination of which this ink is composed makes it
ineradicable by other chemicals which may be used to obliterate or destroy the
permanency of its mark as it presents an obstinate and refractory nature to all
chemical means which may be used to overcome its indelibility.
An ink of this nature which successfully opposes all attempts to destroy its
purpose is greatly in demand by traders as the financial and commercial operations
of the world are increasing in volume and density and the use of paper money is
found to be indispensable to the requirements of commerce consequently avenues
are opened up for the perpetration of fraud in an equally increasing ratio therefore
the use of this ink reduces the possibility of such frauds to a minimum acting not
only as a deterrent from but also as a detector of crime and dishonest manipulations
of documents.
The ingredients of which our improved ink is composed of are as follows-
Preferably we convert sugar by the aid of concentrated sulphuric or other acids
into carbon black or we use lamp black vegetable black soot or other simple carbons
in certain approved proportions to these we add a solution of gum arabic or other
mucilage caustic soda oxalic acid or indian ink. To the above ingredients we add
vanadium in any form, Aleppo galls, nut galls, the whole being finished by the
addition of a small quantity of aniline dye for giving a tint to the mixture, enough
water is added during manufacture to make a freely flowing ink which is then ready
for use.
We do not confine ourselves to any exact proportions of the component parts
above mentioned as they can be arranged in variable quantities but we would have
it distinctly understood that the basis of our invention consists in the use of carbon
black to which the other ingredients serve as correctors and suspenders.
We find the following proportions yield good results-

page_text: Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what we
claim is :-
1. The combination of carbon black with caustic soda, oxalic acid, indian ink
vanadium Aleppo galls, nut galls and gum arabic or other mucilage in variable
proportions together with a sufficiency of aniline dye for coloring, the whole being
associated by a sufficiency of water to make a freely flowing ink substantially as
and for the purposes herein set forth and explained.
2. The combination of carbon black and one or more of the ingredients above
mentioned with vanadium in any of its forms or combinations and mixed with
water to form an ink substantially as and for the purposes herein set forth and
explained.
Dated this Fifteenth day of Santomber 1800.
W. H. Beck,
T. W. JUST.
ROBERT WEILER.
OTTO HEIDEPRIEM.
115, Cannon Street, London, E.C., Consulting Engineer and Patent Agent.