DOI Page / Citation link:
https://doi.org/10.11588/diglit.19571#0087
THE ARTIST's ASSISTANT. 73
CHRYSTALS of VERDICRISE; called
Distilled Verdigrise.
il Take of the belt verdigrife four ounces, and of
w diftill'd vinegar two quarts. The verdigrife being
" well pounded, let them be put into a circulating
u veffel, thatmav be formed of a mattrafs (which is a
'■' round bodied glafswith a long ftraight neck) and a
" Florence fiafk; 'which muft have its neck inverted
" into the mattrafs, the thick end being broken off.
t; This circulating veffel muft be placed in a gentle
!; fand-heat, or other warm fituation, where it muft
{: continue, being frequently fhaken, till the vinegar
" has diffolved as much as it can of the verdisrife.
'; Remove the verdigrife and vinegar then into a pro-
" per glais for decanting the fluid, when it fhall be-
" come clear from the iediment : and when it has
" flood a due time to fettle, let it be carefully poured
'; off and evaporated to about half a pint; which is
" befl done with a fand heat, in a glals body or cu-
i: curbit, having its neck cut off to form a wide mouth.
(i It may be fet to {hoot in the fame veffel, or in a
" glafs receiver with a wide neck ;. and when the
" chryftals are formed, they mult be taken out and
t: carefully dried in thefhade.
'; A frefli proportion of vinegar may be added to
cs the remains of the verdigrife ;. and at the lame
" time the firft quantity left undiffolved ; and the
" mothers, or fluid remaining after the chryftals
- were formed, may be put into it;. by which means,
" the other parts of the procefs being repeated, a
" fecond quantity of the chryftals may be obtained."
The chryftals made thus are of a bright green co-
lour, and if uied with varnifh fo as to ftand, have
K a fine
CHRYSTALS of VERDICRISE; called
Distilled Verdigrise.
il Take of the belt verdigrife four ounces, and of
w diftill'd vinegar two quarts. The verdigrife being
" well pounded, let them be put into a circulating
u veffel, thatmav be formed of a mattrafs (which is a
'■' round bodied glafswith a long ftraight neck) and a
" Florence fiafk; 'which muft have its neck inverted
" into the mattrafs, the thick end being broken off.
t; This circulating veffel muft be placed in a gentle
!; fand-heat, or other warm fituation, where it muft
{: continue, being frequently fhaken, till the vinegar
" has diffolved as much as it can of the verdisrife.
'; Remove the verdigrife and vinegar then into a pro-
" per glais for decanting the fluid, when it fhall be-
" come clear from the iediment : and when it has
" flood a due time to fettle, let it be carefully poured
'; off and evaporated to about half a pint; which is
" befl done with a fand heat, in a glals body or cu-
i: curbit, having its neck cut off to form a wide mouth.
(i It may be fet to {hoot in the fame veffel, or in a
" glafs receiver with a wide neck ;. and when the
" chryftals are formed, they mult be taken out and
t: carefully dried in thefhade.
'; A frefli proportion of vinegar may be added to
cs the remains of the verdigrife ;. and at the lame
" time the firft quantity left undiffolved ; and the
" mothers, or fluid remaining after the chryftals
- were formed, may be put into it;. by which means,
" the other parts of the procefs being repeated, a
" fecond quantity of the chryftals may be obtained."
The chryftals made thus are of a bright green co-
lour, and if uied with varnifh fo as to ftand, have
K a fine