IMPROVEMENTS IN THE PRODUCTION OF PRINTING INK
Year: 1877

page_text: LETTERS PATENT to Thomas Howard, of Wretton House, in the County of
Norfolk, Esquire, for the Invention of "IMPROVEMENTS IN THE PRODUCTION OF
PRINTING INK."
the 16th November 1877, and dated the 6th September 1877.
PROVISIONAL SPECIFICATION left by the said Thomas Howard at the Office
of the Commissioners of Patents on the 6th September 1877.
THOMAS HOWARD, of Wretton House, in the County of Norfolk, Esquire. "IM-
PROVEMENTS IN THE PRODUCTION OF PRINTING INK."
This Invention has for its object the production of a printing ink of superior
quality more economically than heretofore, and it consists in the utilization of peat
charcoal as a pigment in the composition of the same, together with any other
suitable ingredients such as are ordinarily employed in conjunction with pigments
for the purpose.
The peat charcoal, which has been prepared by subjecting peat to the action of
heat in any usual or well-known manner, is first reduced to a fine state of division,
and the powder thus obtained is mixed or incorporated with boiled oil, soap, black
rosin, or any other suitable equivalent substances, with or without the addition of
other coloring matters, according to the nature of the ink to be produced and the
purpose to which it is to be applied.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Thomas Howard in the Great Seal Patent Office on the 6th
March 1878.
THOMAS HOWARD, of Wretton House, in the County of Norfolk, Esquire.
PROVEMENTS IN THE PRODUCTION OF PRINTING INK.'
"IM-
My said Invention has for its object the production of a printing ink of superior
quality more economically than heretofore, and it consists in the utilization of peat
charcoal as a pigment in the composition of the same, together with any other
suitable ingredients such as are ordinarily employed in conjunction with pigments
for the purpose.
The peat charcoal, which has been prepared by subjecting peat contained in a
closed vessel to the action of heat, is first reduced to a fine state of division, and
the finely divided powder thus obtained either livigated or in its pulverized con-
dition is mixed or incorporated with boiled oil, or soap, black resin, or any other
suitable equivalent substances or mixtures of the same, with or without the addition
of coloring matters, according to the nature of the ink to be produced and the
purpose to which it is to be applied.
In carrying out my said Invention I proceed as follows:-I take about ten parts
by weight of the finely divided peat charcoal herein-before referred to; this I
incorporate with boiled oil (linseed oil) in the proportion, by weight, of about eight
parts, and after thorough incorporation and grinding, if necessary, I add desired
pigments.
any
In lieu of employing boiled oil I sometimes employ a mixture of boiled oil with
soap, or with black resin, or with mixtures of the same, the peat charcoal and the
mixture being employed by preference in about equal proportions.
Although I have given the above proportions, they may be varied, accordingto
the quality of the printing ink it is desired to obtain.
Having now described and particularly ascertained the nature of my said Inven-
tion, and the manner in which the same is or may be used or carried into effect,
I would observe in conclusion, that what I consider to be novel and original, and
therefore claim as the Invention secured to me by the herein-before in part recited
Letters Patent is, the production of printing ink by the employment of peat
charcoal, or charcoal in a fine state of division derived from the carbonization of
peat, in conjunction with boiled oil, either alone or with the substances herein-before
mentioned.
In witness whereof, I, the said Thomas Howard, have to this my Specification
set my hand and seal, this fifth day of March, One thousand eight hundred
T. HOWARD. (L.S.)