M E Z 97
2. In chafing your prints to work upon, obferve the paper
they are printed on ; if it be too thick, or too much gummed,
that may be difcovered by wetting a corner of it with water, or
your tongue; where, if it pafTes not through the paper prefently,
it is not fit for the purpofe ; but a thin, fpungy paper, is what
you fhould chufe.
3. The glafs you paint it on, ought not to be common win*
dow-glafs, for that will fpoil your work ; but either true and
thin ground, and well-polifhed looking-glafs, or a fort of fine
white glafs, called Cock-hill glafs.
Of laying Mezzo-TINTO prints upon the glafs.
1. Having provided fuch a glafs of the fame fize as your pic-
ture, fieep the print flat-ways in warm water for four hours,
more or lefs, according to the thicknefs, thinnefs, or hardnefs of
the paper; and then, with a thin knife or brufh, the hairs of
which will not come out, fpread Venice turpentine very thin and
even all over the glafs : And, if the weather be cold, warm the
glafs at the fire, and dab it all over with your fingers, that there
may not be the leaft fpeck of the glafs uncovered with turpentine.
2. Then take the print out of the water, and lay it on a table
fmooth, upon a clean napkin or fheet of paper, or between two
papers, to dry out all the fuperfluous water.
3. When you have done this, lay the print upon the glafs by
degrees, beginning at one end, and ftroking outwards that part
which is juft fattened to the glafs, that no wind or water may
lie betwixt that and the glafs, which will caufe blifters, and
which you mufl always be very careful to ftroke out.
4. If you perceive you have not laid the print on the glafs
exactly even, then, by warming the fore fide of the glafs before
the fire, it will fo foften and thin the turpentine, that you may,
with care and gentlenefs, take it off again, and lay it on again
immediately, not fuffering the print to dry.
5. Your print being laid on the glafs exaclly, you muff pro-
ceed to rubbing it with your finger, to rub off all the thicknefs
of the paper, which will roll off in little rolls, till nothing of it is
left upon the glafs but a thin film like a cobweb, that is faff, ftuck
to the glafs by the turpentine; but great care is to be taken in
rubbing, that you do not rub any holes in the print, efpecially
in the lights, which are the moft tender parts.
6. If your picture be large, fo that fome part of the paper
fhould grow dry, while you are rubbing the other, you fhould,
with a little water on your finger, wet them now and then, as
you fee occafion, to keep them moift, for the paper will not
rub when grown dry.
7. When you have rubbed or peeled it all over, fo long as
till you perceive the print appear tranfparent on the backfide j
Vol. II. H then
2. In chafing your prints to work upon, obferve the paper
they are printed on ; if it be too thick, or too much gummed,
that may be difcovered by wetting a corner of it with water, or
your tongue; where, if it pafTes not through the paper prefently,
it is not fit for the purpofe ; but a thin, fpungy paper, is what
you fhould chufe.
3. The glafs you paint it on, ought not to be common win*
dow-glafs, for that will fpoil your work ; but either true and
thin ground, and well-polifhed looking-glafs, or a fort of fine
white glafs, called Cock-hill glafs.
Of laying Mezzo-TINTO prints upon the glafs.
1. Having provided fuch a glafs of the fame fize as your pic-
ture, fieep the print flat-ways in warm water for four hours,
more or lefs, according to the thicknefs, thinnefs, or hardnefs of
the paper; and then, with a thin knife or brufh, the hairs of
which will not come out, fpread Venice turpentine very thin and
even all over the glafs : And, if the weather be cold, warm the
glafs at the fire, and dab it all over with your fingers, that there
may not be the leaft fpeck of the glafs uncovered with turpentine.
2. Then take the print out of the water, and lay it on a table
fmooth, upon a clean napkin or fheet of paper, or between two
papers, to dry out all the fuperfluous water.
3. When you have done this, lay the print upon the glafs by
degrees, beginning at one end, and ftroking outwards that part
which is juft fattened to the glafs, that no wind or water may
lie betwixt that and the glafs, which will caufe blifters, and
which you mufl always be very careful to ftroke out.
4. If you perceive you have not laid the print on the glafs
exactly even, then, by warming the fore fide of the glafs before
the fire, it will fo foften and thin the turpentine, that you may,
with care and gentlenefs, take it off again, and lay it on again
immediately, not fuffering the print to dry.
5. Your print being laid on the glafs exaclly, you muff pro-
ceed to rubbing it with your finger, to rub off all the thicknefs
of the paper, which will roll off in little rolls, till nothing of it is
left upon the glafs but a thin film like a cobweb, that is faff, ftuck
to the glafs by the turpentine; but great care is to be taken in
rubbing, that you do not rub any holes in the print, efpecially
in the lights, which are the moft tender parts.
6. If your picture be large, fo that fome part of the paper
fhould grow dry, while you are rubbing the other, you fhould,
with a little water on your finger, wet them now and then, as
you fee occafion, to keep them moift, for the paper will not
rub when grown dry.
7. When you have rubbed or peeled it all over, fo long as
till you perceive the print appear tranfparent on the backfide j
Vol. II. H then