An Improved Anti-fouling Paint.
Year: 1894

page_text: Date of Application, 7th Dec., 1894-Accepted, 26th Jan., 1895
An Improved Anti-fouling Paint.
We, JOHN HOLLIDAY, of Wellington, Harbourmaster, and ANGUS CAMERON,
of Leith Street, Dunedin, Marine Superintendent Union Steam Ship Company of
New Zealand, both in the Colony of New Zealand, 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 :-
Our invention relates to paints such as are used upon ships' bottoms and other
surfaces subjected to the deleterious action of salt water.
The objects of our invention are to provide a paint which shall more effectually
resist the destructive action of salt water; shall not be easily removed by the
washing action of waves; and shall impede or retard the growth of marine matter,
whether vegetable or animal upon the painted surface.
In carrying the objects of our invention into effect we make use of materials
which in combination shall so adhere to the surface to be preserved and form such
an outside surface that iron and other materials are saved from injury in a more
effectual manner than with the preparations at present in use for such purposes.
In the manufacture of our anti-fouling paint we employ the following ingredients
and in the proportions given :-
White zinc
Kerosene
Patent dryers
56 lbs.
-
-
1 gallon.
half lb.
One-seventh of a pint of the kerosene is mixed with the half lb. of patent dryers
which we prefer to be Hubbock's forming a first mixture.
The remainder of the kerosene is thoroughly mixed with the 56 lbs. of white
zinc, when it will have a consistency of ordinary paint, forming a second
mixture.
These two mixtures are then mixed together and thoroughly shaken up to
ensure entire admixture of the ingredients, after which the paint is ready
for use.
If the paint has been standing for a considerable time and become thick we make
the same thin by adding kerosene.
The manner of employing our paint is as follows ;-
The surface to be preserved must be thoroughly cleaned and then we prefer that
it should receive a coat of red lead paint in the ordinary manner, and we then
prepare a mixture of white zine and clear boiled oil having a consistency of
ordinary paint. A coat of this latter mixture is applied upon the surface of the red
lead paint.
As soon as this latter coat has dried we apply a coat of our anti-fouling paint with
a brush in the usual manner.
A result obtained by using our paint is that a vessel is prevented from rusting,
and remains cleaner with a resulting decrease of fuel for a given speed, or with
sailing ships an increase of speed for a given wind, than where inferior anti-fouling
noints are usad

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 improved anti-fouling paint substantially as hereinbefore described and
set forth.
2. The method of manufacturing the anti-fouling paint as hereinbefore described
and set forth.
Dated this 30th day of October 1894.
A. M. & WM. CLARK,
53, Chancery Lane, London, Chartered Patent Agents.