Salmon, William: Polygraphice: Or, The Arts of Drawing, Engraving, Etching, Limning, Painting, Washing, Varnishing, Gilding, Colouring, Dying, Beautifying and Perfuming: In Four Books ... To which is added A Discourse of Perspective and Chiromancy (London, 1675)

ij§ Folygraphkes* Lib.j.
slrike it over with the said Varnisti, and it will be
done.
VI. 'to imitate tortoist-sbell itpm Silver or Gold.
A white ground being laid, and smeared over
with Vermilion or the like i lay over the same lea-
ves of Silver or Gold ( as we have taught in other
places) either with Gum-Ammoniacum , Lake,
common Varn'tjh or glair > this done, and being dry-
ed, {hadow it according to reason ■> sinking it over
here and there with yellow Varnish ■> and with
the yellow Varnish mixed with a little -red Var-
nifh > C all things being done in imitation of the
ihell ) strike it several times over with the Uni-
versal Varnijh> and polim it (in all respedts ) as be-
fore.
VII. to imitate Lapis Lazuli.
Upon a ground of White-lead, Spodium or the like
in common Varnish ( being hrst dry ) lay Ultramarine
or some other pure blew well mixed with the Uni-
versal Varnish, so as that the ground may not appear :
then with wild, irregular streaks ( in resemblance of
Nature) with liquid or {hell Gold, run firaglingly all
over the blew, adding very small specks upon the
blew part, of such various colours, as are usually to be
seen upon the stone.

CHAP.