BOLLITO, a name by which the Italians call a
sea-green colour in artificial crystal. To prepare this
colour, you must have in the furnace a pot filled with
40lb. of good crystal, first carefully skimm'd, boiled,
and purified, without any manganese: then you must
have twelve ounces of the powder of small leaves of cop-
per thrice calcined, and half an ounce of zaffre in pow-
der: mix them together; and put them at four times in-
to the pot, that they may the better mix with the glass;
stirring them well each time of putting in the powder,
lest the mixture should swell and run over.