Compound for and Method of Cleansing Lithographic Stones.
Year: 1889

page_text: Compound for and Method of Cleansing Lithographic Stones.
GEORGE SAMUEL WILLIS Artist and GEORGE MARPOLE WILLIS both of 47 Union
Road Clapham in the County of Surrey the last mentioned person is an Electrical
Engineering Student 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 :-
Remove all surface ink and scratches from surface of stone by rubbing with
pummice stone or snakestone, heat the surface of stone, then place it horizontally on
trough pour on boiling water wipe quickly with dry cloth pour on solution composed
of caustic potash gamboge and water carefully draw solution all over surface of stone
with a wooden impliment leave solution on stone one minute then pour on methylated
spirits of wine quickly mix both together with impliment, leave the liquids on stone
half minute then pour on boiling water using the impliment to remove liquids from
surface of stone then quickly dry surface of stone with a cloth.
Repeat this process five times more.
Then cover surface of stone with methylated spirits of wine, leave it on half
minute wash with boiling water and wipe surface of stone dry.
Then cover surface of stone with turpentine leave it on a quarter of minute then
wash off with boiling water and wipe surface of stone dry.
The stone is now
Then etch stone with solution of citric or acetic acid, wash off with warm water,
then polish or grain the stone as required in the usual manner.
perfectly clean and ready for use.
Having now particulary described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what we
claim is ;
1. That by our process we thoroughly remove all old work from surface of stone,
which the present grinding process so often fails to do.
2. That by our process stones can be cleaned in twenty minutes, which when
cleaned by manual labour takes five hours.
3. By our process we secure a great saving of valuable stone which in the ordinary
way of cleaning is lost.
Dated this 2nd day of March 1889.
GEORGE SAMUEL WILLIS.
GEORGE MARPOLE WILLIS.

page_text: Date of Application, 31st Jan., 18.9
Complete Specification Left, 2nd Mar., 1889
Complete Specification Accepted, 6th Apr., 1889
We GEORGE SAMUEL WILLIS Lithographic Artist and GEORGE MARPOLE WILLIS
Student (engineer) both residing at 47 Union Road, Clapham in the parish of
Lambeth in the County of Surrey do hereby declare the nature of this invention to be
as follows:-
Remove surface ink from face of stone with sandstone, heat stone by pouring on
boiling water, dry surface and apply compound composed of caustic potash and
gamboge and water leave on stone a minute then add methylated spirits, mix the
two, leave on half minute and wash off with boiling water; repeat applications of
caustic potash methylated spirits and water several times, then apply methylated
spirits only wash off with boiling water, then apply turpentine wash off with boiling
water, then apply a solution of citric or acetic acid, wash off and polish with snake
stone or grain the stone as needed..
T
1000
GEORGE SAMUEL WILLIS.
GEORGE MARPOLE WILLIS.