IMPROVEMENTS IN PRINTING ON PAPER AND TEXTILE FABRICS
Year: 1879

page_text: LETTERS PATENT to Herbert John Haddan, of the Firm of Herbert and
Company, Solicitors of Patents, of 67, Strand, in the City of Westminster,
Civil Engineer, for the Invention of "IMPROVEMENTS IN PRINTING ON PAPER
AND TEXTILE FABRICS." A communication from abroad by August Wohl-
farth. of Leipzig, in the Kingdom of Saxony.
PROVISIONAL SPECIFICATION left by the said Herbert John Haddan at the
Office of the Commissioners of Patents on the 13th January 1879.
HERBERT JOHN HADDAN, of the Firm of Herbert and Company, Solicitors of
Patents, of 67, Strand, in the City of Westminster, Civil Engineer. "IMPROVE-
MENTS IN PRINTING ON PAPER AND TEXTILE FABRICS." A communication from
abroad by August Wohlfarth, of Leipzig, in the Kingdom of Saxony.
The Invention consists in mixing the metallic powder or other colouring material
in the shape of powder with a binding substance, such as water glass, and in dis-
tributing the mixture in the usual way upon type printing blocks or pressing
rollers, from which it can and is to be summarily transferred on paper, oilcloth, or
other fabrics, as well as on wood and metal. I prefer to use one part of finely-
ground metal or bronze powder with double the quantity of water glass, and obtain
in this way a colour which dries very fast, resists cold water and oil, and is
indifferent to light and beat, as well as to oxygen and sulphuretted hydrogen.
The relative quantity of colour and of binding material may be varied according to
the quality of colouring substance and the desired intensity of colour. To prevent
the mixture from getting stiff during the printing process it may be attenuated by
adding a suitable quantity of warm water, glycerine, or molasses, or a solution of
sugar, and to remove the colour which remains after printing from the printing
forms they need only be washed with hot water.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Herbert John Haddan in the Great Seal Patent Office on the
9th July 1879.
HERBERT JOHN HADDAN, of the Firm of Herbert and Company, Solicitors of
Patents, of 67, Strand, in the City of Westminster, Civil Engineer.
" IMPROVE-
MENTS IN PRINTING ON PAPER AND TEXTILE FABRICS." A communication from
abroad by August Wohlfarth, of Leipzig, in the Kingdom of Saxony.
The Invention consists in mixing metallic powder or other colouring material in
the shape of powder with a binding substance, such as waterglass, and in dis-
tributing the mixture in the usual way upon type, printing blocks, or pressing
rollers, from which it can and is to be summarily transferred on paper, oil cloth, or
other fabrics, as well as on wood and metal. I prefer to use one part of finely-
ground metal or bronze powder with double the weight of waterglass, and obtain
in this way a colour which dries very fast, resists cold water and oil, and is
indifferent to light and heat as well as to oxygen and sulphuretted hydrogen.
The relative quantity of colour and of binding material may be varied according to
the quality of colouring substance and the desired intensity of colour. In conse-
quence of the fast drying of the mixture of colour with waterglass the process of
printing should be carried on continuously, and to prevent the mixture from getting
stiff during the printing process it may be attenuated by adding a suitable quantity
of warm water (10-20%). The same result is also obtained by the addition of
glycerine or molasses, or a solution of sugar (5-10 °), which substances serve
further to increase the adhesion of the printing colour, and to remove the colour
which remains after printing from the printing forms they need only be washed
with hot water. The described mixture and process may be used for printing_on
paper, oil cloth, or other fabrics, and also for printing on wood, metal, glass, or other
materials.
In witness whereof, I, the said Herbert John Haddan, have hereunto set my
band and seal this Ninth day of July AD. 1879.