A New or Improved Mode of Printing or Producing Luminous Posters and Public Announcements Capable of being Seen and Read both by Day and by Night.
Year: 1888

page_text: Date of Application, 13th Oct., 1888
Complete Specification Left, 12th July, 1859-Accepted, 17th Aug., 1889
PROVISIONAL SPECIFICATION.
A New or Improved Mode of Printing or Producing Luminous
Posters and Public Announcements Capable of being Seen and
Read both by Day and by Night.
I JAMES HODGSON of Theatre Street, Ulverston, in the County of Lancaster,
Colliery Agent, do hereby declare the nature of this Invention to be as follows:-
My said Invention relates chiefly to an improved mode of printing posters or
bills or public announcements either in luminous letters upon a dead ground or dead
letters upon a luminous ground. In practice I have found that for printed announce-
ments dead letters upon a luminous ground produce the best effect, but I do not
confine myself to this. In preparing a poster with a luminous ground for the
reception of dead letters I coat the surface of the paper with a liquid mixture com-
posed of the following ingredients. I take one pound by weight of the powder from
which the now well known Balmains luminous paint is produced and mix therewith
one pound of size and two ounces of salt petre or some other suitable astringent
salt. To this mixturo I add two gallons of water and after well mixing, the
composition is ready for application to the paper. In the event of the aforesaid
commercial luminous powder not being obtainable a convenient substitute may be
made as follows. To fifty parts of oxide of calcium add thirty-two parts of sulphide
of calcium and eighteen parts of sulphate of calcium, or the latter two ingredients
may be added in a state of combination in the form of oxysulphide of calcium.
The powder produced from these materials is combined with the aforesaid proportions
of size, saltpetre and water and is then carefully spread upon the paper either by
hand or by means of a suitable surfacing machine. It will be found that paper
prepared in this manner and exposed to daylight developes luminosity in darkness so
that anything printed upon its surface can easily be read after dark and in the absence
of artificial light. My invention is particularly applicable in the case of large printed
posters and announcements in which the letters are distinct and of considerable size.
Instead of coating the paper with the luminous composition I might introduce it into
the printing liquid and print luminous letters upon a dead ground or I might mix the
luminous substance with the pulp from which the paper is made. My invention is
not limited to the production of words and letters upon posters or bills as it might
also be used in pictorial and theatrical posters the representations being produced
either en silhouette or in gradations of light and shade. It will be evident that when
posters and announcements are produced in accordance with my invention their value
in attracting public attention is greatly enhanced both by their novelty and by their
increased utility.
Dain this 15th 1...
1000
DUTTON & FULTON,
1, St. James Square, Manchester, Agents.
COMPLETE SPECIFICATION.
A New or Improved Mode of Printing or Producing Luminous
Posters and Public Announcements Capable of being Seen and
Read both by Day and by Night.
I JAMES HODGSON of Theatre Street, Ulverston, in the County of Lancaster,
Colliery Agent, 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, that is to say :-
My said Invention relates chiefly to an improved mode of printing large posters

page_text: or bills or public announcements either in luminous letters upon a dead ground or
in dead letters upon a luminous ground. In practice I have found that for printed
announcements dead letters upon a laminous ground produce the best effect, but I
do not confine myself to this. In preparing a poster with a luminous ground for
the reception of dead letters I coat the surface of the paper with a liquid mixture
composed of the following ingredients. I take one pound by weight of the powder
from which the now well known Balmains luminous paint is produced and mix
therewith one pound of size. To this mixture I add two gallons of water and after
well mixing, the composition is ready for application to the paper. In the event of
the aforesaid commercial luminous powder not being obtainable a convenient substitute
may be made as follows. To fifty parts of oxide of calcium add thirty two parts of
sulphide of calcium and eighteen parts of sulphate of calcium, or the latter two
ingredients may be added in a state of combination in the form of oxysulphide of
calcium. Instead of the sulphide and sulphate of calcium as set forth I might use
similar proportions of sulphide or sulphate of barium. The powder produced from
these materials is combined with the aforesaid proportions of size and water and is
then carefully spread upon the paper either by hand or by means of a suitable surfacing
machine. It will be found that paper prepared in this manner and exposed to day-
light developes luminosity in darkness so that anything printed upon its surface can
easily be read after dark and in the absence of artificial light. My invention is
particularly applicable in the case of large printed posters and announcements in
which the letters are distinct and of considerable size. Instead of coating the paper.
with the luminous composition I might introduce it into the printing liquid and
print luminous letters upon a dead ground. My Invention is not limited to the
production of words and letters upon posters as it might also be used in pictorial and
theatrical posters the representations being produced either in silhouette or in
gradations of light and shade. The invention can also be applied in the manufacture
of enamel plates for all purposes such for example as signboards, advertisements and
the like. It will be evident that when posters and announcements are produced in
accordance with my invention their value in attracting public attention is greatly
enhanced both by their novelty and by their increased utility.
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) The production of printed luminous posters, enamel plates and other public
announcements capable of being read in the dark after exposure to daylight by the
means and substantially as described.
(2) As a means for the production of printed luminous posters, enamel plates and
other public announcements the luminous composition for coating the surface of the
paper or other material or metal to receive the printing, or for printing upon the
non-luminous material, or for mixing with the printing ink or agent and consisting
of Balmains luminous paint in combination with size and water or otherwise the said
luminous composition may be made of the indicated proportions of oxide, sulphide
and sulphate of calcium or barium also in combination with size and water prepared
and applied substantially as herein before set forth.
Dated this 11th day of July 1889
DUTTON & FULIUN,
1, St. James Square, Manchester, Agents.