A New or Improved White Pigment.
Year: 1890

page_text: Date of Application, 20th Jan., 1890
Complete Specification Left, 20th Oct., 1890-Accepted, 20th Dec., 1890
A New or Improved White Pigment.
I, HARRY GRIMSHAW of the Canal Chemical Works Clayton Manchester in the
County of Lancaster, Chemical Manufacturer, do hereby declare the nature of this
invention to be as follows :-
The white pigment which is the subject of this invention is an insoluble zinc salt.
which may be prepared in several ways.
I may for example, dissolve metallic zinc in a solution of zinc chloride by the aid
of heat and precipitate the pigment from the solution by means of an alkali. Or, I
may dissolve zinc oxide in a solution of zinc chloride and precipitate the pigment as
before described.
Alternatively, zinc oxide may be mixed with a solution of zinc chloride. It, will
set as a hard mass which may then be ground to a powder to form the new pigment.
The pigment may be ground in oil or be otherwise prepared for use in the same
manner as white lead and other pigments of a similar character.
Dated this 18th day of January A.D. 1890.
WILLIAM E. HEYS,
Agent for the Applicant.
COMPLETE SPECIFICATION.
A New or Improved White Pigment.
I, HARRY GRIMSHAW of the Canal Chemical Works Clayton Manchester in the
County of Lancaster, Chemical Manufacturer, 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:―
The white pigment which is the subject of this invention is an insoluble zinc salt
which may be prepared in several different ways.
I may, for example, dissolve metallic zinc in a solution of zinc chloride (preferably
a solution of about 100 degrees Twaddle) by the aid of heat, and afterwards
precipitate the pigment from the solution, by cooling it with or without the addition
of an alkali. Or, I may dissolve zinc oxide in the solution of zinc chloride and
precipitate the pigment as hereinbefore described.
Alternatively, zinc oxide may be mixed with the solution of zinc chloride. This
mixture will set to a comparatively hard mass which may then be ground to a powder
to form the pigment.
The pigment manufactured or prepared according to this invention may be ground
in oil or in water, and may be otherwise prepared, and it may be employed in the
ground" or in the dry states, for various purposes, in the same manner as white
lead, zinc oxide, zinc sulphide, and other white pigments.
66
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. A white pigment consisting of an insoluble zinc salt, manufactured or prepared
substantially as hereinbefore described.
2. In the manufacture of white pigments, dissolving metallic zine or zinc oxides
in a solution of chloride of zinc, and thereafter precipitating the white pigment
from the solution, substantially as hereinbefore described.

page_text: 3. In the manufacture of white pigments, mixing oxide of zinc with a solution of
chloride of zinc and grinding the resulting compound to powder, substantially as
hereinbefore described.
Dated: 101 J
A D1000
WILLIAM E. HEYS,
Agent for the Applicant.