IMPROVEMENTS IN DECORATING GLASS WITH ACIDIZED AIR CHAMBERS
Year: 1885

page_text: I WILLIAM WEBB BOULTON of Audnam in the Parish of Kingswinford in the
County of Stafford Glass Manufacturer do hereby declare the nature of my
invention for "IMPROVEMENTS IN DECORATING GLASS WITH ACIDIZED AIR
CHAMBERS" to be as follows :-
:-
My invention consists in decorating Glass of any color either opaque or flint or
clear by means of acidized air chambers which produce or give the surface of the
decorated article a silky or pearly character or appearance and the method of
decoration is as follows.
It has long been the practice of Glassmakers to produce glass articles in such a
manner that air chambers are formed in their otherwise solid sides.
It has also long been the practice of Glass makers to decorate glass articles by
immersing thein in acid.
My invention consists in decorating glass articles of any colour in which air
chambers have been formed by immersing the glass article in acid which acid
produces on the several parts of the surface where the air chambers occur an effect
different from the effect produced on those parts of the surface where the air
chambers do not occur the effect so produced being to give to the surfaces where
the air chambers occur a silky or pearly character or appearance.

page_text: I WILLIAM WEBB BOULTON of Audnam in the Parish of Kingswinford in the
County of Stafford Glass Manufacturer do hereby declare the nature of my
invention for "IMPROVEMENTS IN DECORATING GLASS" and in what manner the
same is to be performed to be particularly described and ascertained in. and by
the following statement :-
My invention consists in decorating Glass of any color either opaque or flint or
clear by means of acidized air chambers which produce on or give to the surface of
the decorated article a silk-like or pearl-like appearance.
My method of decorating is as follows.
It has long been the practice of Glass makers to manufacture Glass articles in
such a manner that hollow air chambers are formed in such articles either in their
tops, or their sides, or their bottoms the articles being solid except in the places
where the air chambers are formed. It has also long been the practice of Glass
makers to decorate Glass articles by immersing them in acid.
My invention consists in a combination of these practices. I manufacture Glass
articles of any color in the usual way in such a manner that hollow air chambers
are formed in such articles. These articles are annealed and cooled. I prepare the
acid to be used by placing it in vessels of Clay, the acid employed by me being
fluoric acid reduced by carbonate of ammonia in the usual way and so as to be of
the usual strength-then I immerse the glass articles in this acid so reduced and
allow them to remain therein for a period of about an hour and a half.
The acid produces on the several parts of the surface where the hollow air
chambers are formed an effect different from and contrasting with the effect
produced on the surface of the solid parts of the articles, the effect so produced
being to give to the surface where the hollow air chambers are formed the
decoration of a silk-like or pearl-like appearance.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed I declare that what
I claim is
1. That I decorate Glass articles of any color in which hollow air chambers have
been formed by immersing them in acid.
Dated this third day of December One thousand eight hundred and eighty five.