DOI Page / Citation link:
https://doi.org/10.11588/diglit.19575#0260
SAT 239
made faff. ; and, when they be thoroughly dry, varnifh them over
with the following tranfparent varnifh :
Take a pound of good clear nut oil, put it into an earthen
pipkin, and add to it half a pound of fdver litharge in fine pow-
der \ fet it on a fmall fire, but not to boil; and let it ftand hot,
at leaf! twelve hours, ffirring it often in that time. Pour it off
from the litharge by inclination ; and take a pound and an half
of the cleareff. white rofin, beat it to powder, and mix it with
the oil on a flow fire, always ftirring it till the rofin be difTclved ;
then take it off, and put into it a pound of good clear Venice
turpentine, and ftir them all well together ; and, with a good
brufh, let your Safhes be thoroughly varnifhed over with this
mixture, fo that they may appear all over clear and tranfparent.
When this varnifh is dry, you may paint upon them what
fancy you pleafe with oil colours, but landfcape is moft common
and natural ; for which purpofe, the colours you mix ought to
be fuch as are of a fine body, and apt to become tranfparent.
For thefe purpofes, lake makes an excellent tranfparent ruby
colour, and diftilled verdigreafe makes an incomparable tranfpa-
rent green ; orpiment makes an excellent tranfparent gold co-
lour ; umber and yellow oker will become indifferent tranfpa-
rent, if thinly mixed : Eut, for the reft, there are none that will
lie clear in this work, but only according to the very thinnefs of
their mixture with the oil.
The aforefaid varnifh, as it is clear of itfelf, is an excellent
varnifh for paper windows, being much more tranfparent than
any other compofition, and more lafting; for the rofin and tur-
pentine being made tough, when dry, by means of the oil mixed
with it, more powerfully refift the injuries of the weather than
oil alone.
If any are troubled with weak eyes, and cannot endure a
bright light, this varnifh mixed with diftilled verdigreafe, and
paper windows, or farfnet ones done over with it, will make an
incomparable green light, very comfortable to the fight, and of
great benefit to fuch as love not too much brightnefs: An obfe:-
vation of good ufe to all ftudents, whofe fight is often much im-
paired and weakened by poring too much upon their books ; the
whitenefs of the paper being obferved to be often a great enemy
to the fight, the inconveniencies of which fuch a green light
will infallibly prevent.
Colours for painting SATTINS. For a black Sattin ufe lamp
black, ground with oil, and tempered with white lead ; and,
where you would have it fhine mofl. mix lake with the white
lead.
For white Sattin, ufe white lead, apounq alone, and ivory
black ; which temper light or dark.
For
made faff. ; and, when they be thoroughly dry, varnifh them over
with the following tranfparent varnifh :
Take a pound of good clear nut oil, put it into an earthen
pipkin, and add to it half a pound of fdver litharge in fine pow-
der \ fet it on a fmall fire, but not to boil; and let it ftand hot,
at leaf! twelve hours, ffirring it often in that time. Pour it off
from the litharge by inclination ; and take a pound and an half
of the cleareff. white rofin, beat it to powder, and mix it with
the oil on a flow fire, always ftirring it till the rofin be difTclved ;
then take it off, and put into it a pound of good clear Venice
turpentine, and ftir them all well together ; and, with a good
brufh, let your Safhes be thoroughly varnifhed over with this
mixture, fo that they may appear all over clear and tranfparent.
When this varnifh is dry, you may paint upon them what
fancy you pleafe with oil colours, but landfcape is moft common
and natural ; for which purpofe, the colours you mix ought to
be fuch as are of a fine body, and apt to become tranfparent.
For thefe purpofes, lake makes an excellent tranfparent ruby
colour, and diftilled verdigreafe makes an incomparable tranfpa-
rent green ; orpiment makes an excellent tranfparent gold co-
lour ; umber and yellow oker will become indifferent tranfpa-
rent, if thinly mixed : Eut, for the reft, there are none that will
lie clear in this work, but only according to the very thinnefs of
their mixture with the oil.
The aforefaid varnifh, as it is clear of itfelf, is an excellent
varnifh for paper windows, being much more tranfparent than
any other compofition, and more lafting; for the rofin and tur-
pentine being made tough, when dry, by means of the oil mixed
with it, more powerfully refift the injuries of the weather than
oil alone.
If any are troubled with weak eyes, and cannot endure a
bright light, this varnifh mixed with diftilled verdigreafe, and
paper windows, or farfnet ones done over with it, will make an
incomparable green light, very comfortable to the fight, and of
great benefit to fuch as love not too much brightnefs: An obfe:-
vation of good ufe to all ftudents, whofe fight is often much im-
paired and weakened by poring too much upon their books ; the
whitenefs of the paper being obferved to be often a great enemy
to the fight, the inconveniencies of which fuch a green light
will infallibly prevent.
Colours for painting SATTINS. For a black Sattin ufe lamp
black, ground with oil, and tempered with white lead ; and,
where you would have it fhine mofl. mix lake with the white
lead.
For white Sattin, ufe white lead, apounq alone, and ivory
black ; which temper light or dark.
For