121 / 330
600
MISCELLANEOUS
VALUABLE
RECEIPTS.
121
for
mixing
with
colours
to
paint
with,
instead
of
oil,
from
its
w-orking
and
spreading
better
in
the
pencil.
No.
235.
To
dissolve
Copal
infixed
Oil
Melt,
in
a
perfectly
clean
vessel,
by
a
very
slow
heat,
1
pound
clear
copal;
to
this
add
from
1
to
2
quarts
prepared
linseed-oil.
When
these
ingre-
dients
are
thoroughly
mixed,
remove
the
vessel
from
the
fire,
and
keep
constantly
stirring
it
till
nearly
cold
;
then
add
a
pound
of
spirits
of
turpen-
tine,
strain
the
varnish
through
a piece
of
cloth,
and
keep
it
for
use.
The
older
it
is,
the
more
drying
it
becomes.
This
varnish
is
verj^
proper
for
wood-
work,
house
and
carriage
painting.
No.
236.
Amber
Varnish.
Amber
varnish
forms
a
very
excellent
one
:
its
solution
may
be
effected
by
boiling
it
in
di
png
lin-
seed-oil.
Oil
varnishes
which
have
become
thick
by
keep-
ing
are
made
thinner
with
spirits
of
turpentine.
No.
237.
Linseed-
Oil
Varnish.
Boil
any
quantity
of
linseed-oil
for
an
hour,
and
'to
every
pint
of
oil
add
i
pound
good
clear
rosin,
well
powdered;
keep
stirring
it
till
the
rosin
is
per-
fectly^
dissolved
and,
when
this
is
done,
add
1
ounce
11