AVED PROCESS FOR HARDENING AND COLOURING SANDSTONE OR OTHER SILICIOUS STONE
Year: 1880

page_text: LETTERS PATENT to Charles Moreing, of No. 37, Spring Gardens, in the
County of Middlesex, for an Invention of "A NEW OR IMPROVED PROCESS
PROVISIONAL SPECIFICATION left by the said Charles Moreing at the
Office of the Commissioners of Patents on the 5th May 1880.
CHARLES MOREING, of No. 37, Spring Gardens, in the County of Middlesex.
"A NEW OR IMPROVED PROCESS FOR HARDENING AND COLOURING SANDSTONE
OR OTHER SILICIOUS STONE."
My Invention relates to a process for hardening sandstone or other silicious
stone, and for giving it various colours. For the purpose of hardening the stone I
soak it in an aqueous solution of an alkali, such as soda or potassa, or of an
alkaline salt, such as alkaline chloride, nitrate, sulphate, carbonate, or the like.
I then dry the stone and bake it almost to vitrification in any suitable kiln, the
stone being thus rendered hard and durable. When extreme hardness is not
required, the solution in which the stone is soaked contains a proportion of alum,
also a small proportion of borax in the solution facilitates the hardening. Various
colours may be imparted to the stone by mixing with the hardening solution small
proportions of metallic salts, such as nitrates of iron, tin, and the like, or of oxides.
such as that of iron, manganese, or other metals.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Charles Moreing in the Great Seal Patent Office on the 5th
November 1880.
CHARLES MOREING, of No. 37, Spring Gardens, in the County of Middlesex.
A NEW OR IMPROVED PROCESS FOR HARDENING AND COLOURING SANDSTONE
OR OTHER SILICIOUS STONE."
My Invention relates to a process for hardening sandstone or other silicious
stone, and for giving it various colours. For the purpose of hardening the stone I
soak it in a solution of an alkali, such as soda or potassa, or of an alkaline salt, such as
alkaline chloride nitrate, sulphate carbonate silicate or the like. I then dry the
stone and bake it almost to vitrification in any suitable kiln, the stone being thus
rendered hard and durable. When extreme hardness is not required, the solution
in which the stone is soaked may contain a small proportion of alum. Various
colours may be imparted to the stone by mixing with the hardening solution small
proportions of metallic salts, such as nitrates of iron, tin, and the like, or of oxides,
such as that of iron, manganese, or other metals.
Having thus described the nature of my Invention, and in what manner the
same is to be performed, I claim,―
First. The process of hardening sandstone or other silicious stone by soaking it
in an alkaline solution, drying and baking it, substantially as herein described.
Second. The process of bardening and also colouring sandstone or other silicious
stone by soaking it in an alkaline solution, with which is mingled a small pro-
portion of metallic salt, drying and baking it, substantially as herein described.
In witness whereof, I, the said Charles Moreing, have hereunto set my
hand and seal, this Twenty ninth day of October, in the year of our
Lord One thousand eight hundred and eighty.
זוזתמו
CHARLES MOREING.
זוזת
(L.S.)