DOI Seite / Zitierlink:
https://doi.org/10.11588/diglit.19571#0184
170 THE ARTIST'S ASSISTANT.
Of black japan grounds, to be produced without
heat.— Black grounds may be formed by either ivory
black, or lamp black ; but the former is preferable,
where it is perfectly good-
Thefe may be always laid on with the fhell-lac var-
nifh ; and have their upper or polifhing coats of
common feed-lac varnifh ;. as the tinge or foulnefs of
the varnifh can be here no injury.
Of common black japan grounds on iron or cop-
per, produced by means of heat.—For forming the
common bkick japan grounds by means of heat, the
piece of work to be japanned muft be painted over
with drying oil ; and when it is of a moderate dry-
nefs, muft be put into a ftove of fuch degree of
heat, as will change the oil black, without burning
it, fo as to deftroy or weaken its tenacity. The ftove
fhould not be too hot when the work is put into it,
nor the heat increafed too fail; either of which er-
rors would make it blifter : but the flower the heat
is augmented, and the longer it-is continued, pro-
vided it be reftrained within the due degree, the
harder will be the coat of japan. This kind of var-
nifh requires no polifh, having received, when pro-
perly managed, a fufficient one from the heat.
Of the fine tortoife fhell japan ground, produced
by means of heat—The beft kind of tortoife fhell
ground produced by heat is not lefs valuable for its
great hardnefs, and enduring to be made hotter than
boiling water without damage, than for its beautiful
appearance. It is to be made by means of a varnifh
prepared in the following manner:
{i Take of good linfeed oil one gallon, and of um-
<c bre half a pound. Boil them together till the
« oil becomes very brown and thick ; /train it then
w through
Of black japan grounds, to be produced without
heat.— Black grounds may be formed by either ivory
black, or lamp black ; but the former is preferable,
where it is perfectly good-
Thefe may be always laid on with the fhell-lac var-
nifh ; and have their upper or polifhing coats of
common feed-lac varnifh ;. as the tinge or foulnefs of
the varnifh can be here no injury.
Of common black japan grounds on iron or cop-
per, produced by means of heat.—For forming the
common bkick japan grounds by means of heat, the
piece of work to be japanned muft be painted over
with drying oil ; and when it is of a moderate dry-
nefs, muft be put into a ftove of fuch degree of
heat, as will change the oil black, without burning
it, fo as to deftroy or weaken its tenacity. The ftove
fhould not be too hot when the work is put into it,
nor the heat increafed too fail; either of which er-
rors would make it blifter : but the flower the heat
is augmented, and the longer it-is continued, pro-
vided it be reftrained within the due degree, the
harder will be the coat of japan. This kind of var-
nifh requires no polifh, having received, when pro-
perly managed, a fufficient one from the heat.
Of the fine tortoife fhell japan ground, produced
by means of heat—The beft kind of tortoife fhell
ground produced by heat is not lefs valuable for its
great hardnefs, and enduring to be made hotter than
boiling water without damage, than for its beautiful
appearance. It is to be made by means of a varnifh
prepared in the following manner:
{i Take of good linfeed oil one gallon, and of um-
<c bre half a pound. Boil them together till the
« oil becomes very brown and thick ; /train it then
w through