Gadzooks! Petrus and Stephania, …it requires all a man’s
energies to make foils, so I thought I, Benvenuto, would give a
few facts about it for the benefit of anyone anxious to learn.
The first foil is called the common foil, it is of a yellow
colour and is used for many jewels and transparent stones. But
first a word as to the weight of a carat, which is a weight of
The foils may be stated in weights thus:
Common (Yellow) Foil. Blue Foil.
9 carats of fine gold 16 carats of fine copper
18 " " silver 4 " " gold
72 " " copper 2 " " silver
Red Foil. Green Foil.
20 carats of fine gold 10 carats, fine copper
16 " " silver 6 " silver
18 " " copper 2 " gold
I, Benvenuto, explain in splendid detail how to work these
metals in Signor Ashbee’s passingly good translation of my
Treatises, already referred to by that eccentric dabbler who
carries himself about as Rex from Oz.