Improvements in Producing Designs on Metallic Surfaces.
Year: 1885

page_text: Improvements in Producing Designs on Metallic Surfaces.
I ARTHUR BRIN of 5 Sydney Street South Kensington in the County of
Middlesex, Engineer and Chemist do hereby declare the nature of my said
Invention for "IMPROVEMENTS IN PRODUCING DESIGNS ON METALLIC SURFACES
to be as follows:-
"
My Invention relates to an improved method or process for producing lettering
or other designs or devices upon advertising plates or tablets metal boxes or other
metal articles by applying a varnish or coating to those parts of the metallic
surface which are to be occupied by the lettering or other design and subjecting
the metal to a process whereby a crystalline appearance is produced on the parts
not protected by the said varnish or coating. The effect of this treatment is that
when the plate or surface is adjusted to the acid bath which brings out or renders
visible the angles of crystallization the said bath has no effect upon the coated or
varnished parts and the lines of the designs or letters stand out in relief in any
desired colour on the surface of the plate or other article.
This result is obtained by causing the angles of crystallization to stop at the
point where the protecting varnish or coating commences.
The designs or advertisements are first produced by hand or otherwise with a
suitable material preferably a lac varnish upon a sheet of tin or other metal and
the varnish or other protective coating is preferably dried in an oven.
The plates or other articles thus prepared are then placed in a suitable furnace
until fusion of the metal surface commences. The metal is then suddenly cooled
by any known means in order to produce a crystallised appearance as is well
understood. The parts covered by the varnish or coating being unaffected by the
crystallising action stand out sharp and clear from the other parts when sub-
sequently exposed to the action of the acid bath. The action of the said bath
may be arrested at any desired point according to the effect to be produced and
the coating may be combined with any desired colour or colours.

page_text: Improvements in Producing Designs on Metallic Surfaces.
I, ARTHUR BRIN, of 5 Sydney Street, South Kensington in the County of
Middlesex, Engineer and 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 :—
My Invention relates to an improved method or process for producing lettering
or other designs or devices upon advertising plates or tablets metal boxes or other
metal articles or surfaces by the combination of crystallized and uncrystallized
portions in contrast and is effected by applying a varnish or coating to parts of the
metallic surface which are not to appear crystallized such for example as those
which are to be occupied by the lettering or other design and then subjecting the
metal to a process whereby a crystalline appearance is produced on the parts not
protected by the said varnish or coating. The effect of this treatment is that when
the plate or surface is subjected to the acid bath which brings out or renders visible
the angles of crystallization the said bath has no effect upon the coated or varnished
parts and the lines of the designs or letters stand out in relief in any desired
colour on the surface of the plate or other article. This result is obtained by
causing the angles of crystallization to stop at the point where the protecting
varnish or coating commences.
The designs or advertisements are first produced by hand or otherwise with a
suitable material preferably a lac varnish upon a sheet of tin or other metal and
the varnish or other protective coating is preferably dried in an oven.
The plates or other articles thus prepared are then placed in a suitable furnace
until fusion of the metal surface commences. The metal is then suddenly cooled
by any known means in order to produce a crystallized appearance as is well
understood. The parts covered by the varnish or coating being unaffected by
the crystallizing action stand out sharp and clear from the other parts when
subsequently exposed to the action of the acid bath.
The action of the acid bath may be arrested at any desired point according to
the effect to be produced and the coating may be combined with any desired colour
or colours.
Having now particularly described and ascertained the nature of my said
Invention and in what manner the same is to be performed, I declare that what
I claim is
In the production of ornamental or other designs lettering or the like upon
metal surfaces by the combination of crystallized and uncrystallized portions first
protecting the portions to appear uncrystallized and then subjecting the surface
thus prepared to a process for producing on the unprotected parts a crystallized
effect as herein before described.
J. HENRY JOHNSON,
Agent for the said Arthur Brin.