to make coullers of mettles
acquefortas warmed, take a coll
of charcole and couer it with
ashes, and set your glase with
the acqueafortis in it upon the
ashes fire, and being warme, put
in your metell to a spoonfull
of watter, 6 pence in sillver.
sillver makes perfitt black
slight sillver makes broune.
mixt with copper, spouery mettell
a seuer all couller, and in your
acqueafortis put a littill sallerm
onick, then will it eat gold
f. 16v
fines gold makes a purple
but being mixt with basser
mettell makes different
coullers,