DOI Seite / Zitierlink:
https://doi.org/10.11588/diglit.19575#0370
342 V A R
This is to be obferved, that, when you have varnifhed with white
Varnifh, you may put the things varnifhed into a declining oven?
which will harden the Varnifh.
A hard Varnish, which will bear the muffie,from a maniifcript
of Mr. Boyle':, for laying over any metal, that appears like gold, to
prevent it from turning black, which all but gold zvill be apt to do,
when expofed to the air. Take of colophony, an ounce; fet it
over the fire in a well glazed earthen veffel, till it is melted ; then
by little and little ftrew in two ounces of powder of amber,
keeping ftirring it all the while with a ftick ; and, when you per-
ceive it begin to harden or refift the ftick, then put in a little tur-
pentine oil, which will thin and foften it immediately ; then put
in two ounces of gum copal, finely powdered, fprinkling it in as
you did the amber, ever and anon pouring in a little oil of tur-
pentine ; and, when it is done, ffrain it as before directed.
This is proper to Varnifh over gold; the things done with it
rnuft be fet into a declining oven, three or four days fucceffively,
and then it will refift even the fire.
A Varnish for brafs, to make it look like gold. This is ufed
upon leaf gold, or upon that which is called Dutch or German
Jeaf gold, or upon brafs or bath-metal, which are defigned to
imitate gold.
Take two quarts of fpirit of wine, and put it into a retort glofs;
then add to it an ounce of gamboge, two ounces of lake, and
two ounces of gum maftic; fet this in a fand heat for fix days,
or elfe near a fire ; or you may put the body of the retort fre-
quently into warm water, and fhake it two or three times a day,
then fet it over a pan of warm fmall-coal duff. Before you lay
this Varnifh over the metal, to be fure you fee that it has been
well cleaned, Varnifh it over thinly with this Varnifh, and it will
appear of the colour of gold. Set it in a declining oven to hard-
en, and it will not rub off.
N. B. This is a good Varnifh to mix with any colours that
incline to red, and the white Varnifh for mixing with thofe that
are pale.
To make thejfrong Japan Varnish. See JAPAN.
Varnijhing prints, &c. with white Varnish, fo as to bear wa-
ter andpolijhing. The print fhould be firft pafted either on board
or fhoclc cloth, ftrained on a frame ; in order to do this well,
prepare fome ft iff ftarch ; and with a fponge dipped in water, or
thin ftarch, without any blue in it, wet the back of your print ;
and, if you deilgn to lay it on a board, dip a large brufh in thick
ftarch, and brufh it over the board as even as poffible, and let it
dry ; or you may lay a ground of whiting and fize on the board
ftrft, which will do very well ; then repeat it a fecond time, and
fo continue till the veins or grain of the wood are quite filled.
This is to be obferved, that, when you have varnifhed with white
Varnifh, you may put the things varnifhed into a declining oven?
which will harden the Varnifh.
A hard Varnish, which will bear the muffie,from a maniifcript
of Mr. Boyle':, for laying over any metal, that appears like gold, to
prevent it from turning black, which all but gold zvill be apt to do,
when expofed to the air. Take of colophony, an ounce; fet it
over the fire in a well glazed earthen veffel, till it is melted ; then
by little and little ftrew in two ounces of powder of amber,
keeping ftirring it all the while with a ftick ; and, when you per-
ceive it begin to harden or refift the ftick, then put in a little tur-
pentine oil, which will thin and foften it immediately ; then put
in two ounces of gum copal, finely powdered, fprinkling it in as
you did the amber, ever and anon pouring in a little oil of tur-
pentine ; and, when it is done, ffrain it as before directed.
This is proper to Varnifh over gold; the things done with it
rnuft be fet into a declining oven, three or four days fucceffively,
and then it will refift even the fire.
A Varnish for brafs, to make it look like gold. This is ufed
upon leaf gold, or upon that which is called Dutch or German
Jeaf gold, or upon brafs or bath-metal, which are defigned to
imitate gold.
Take two quarts of fpirit of wine, and put it into a retort glofs;
then add to it an ounce of gamboge, two ounces of lake, and
two ounces of gum maftic; fet this in a fand heat for fix days,
or elfe near a fire ; or you may put the body of the retort fre-
quently into warm water, and fhake it two or three times a day,
then fet it over a pan of warm fmall-coal duff. Before you lay
this Varnifh over the metal, to be fure you fee that it has been
well cleaned, Varnifh it over thinly with this Varnifh, and it will
appear of the colour of gold. Set it in a declining oven to hard-
en, and it will not rub off.
N. B. This is a good Varnifh to mix with any colours that
incline to red, and the white Varnifh for mixing with thofe that
are pale.
To make thejfrong Japan Varnish. See JAPAN.
Varnijhing prints, &c. with white Varnish, fo as to bear wa-
ter andpolijhing. The print fhould be firft pafted either on board
or fhoclc cloth, ftrained on a frame ; in order to do this well,
prepare fome ft iff ftarch ; and with a fponge dipped in water, or
thin ftarch, without any blue in it, wet the back of your print ;
and, if you deilgn to lay it on a board, dip a large brufh in thick
ftarch, and brufh it over the board as even as poffible, and let it
dry ; or you may lay a ground of whiting and fize on the board
ftrft, which will do very well ; then repeat it a fecond time, and
fo continue till the veins or grain of the wood are quite filled.