DOI Page / Citation link:
https://doi.org/10.11588/diglit.19574#0325
298 - E N G
reft of the medal, as the mouldings of the border, the ingrailed
ring, the letters, &c.
All which, particularly the letters or ingrailment, are perform-
ed with little fteel punches, well tempered and very fharp: And,
as they fometimes make ufe of puncheons to engrave the creux
of the matrix, fo on fome occafions they make ufe of the creux
of the matrix to engrave the relievo of the punch.
To examine and judge of the Engraving in creux, divers me-
thods have been devifed to take the impreffions from it, as the
work proceeds.
Sometimes they make ufe of a compofition of common wax,
turpentine, and lamp-black, which, always retaining its foftnefs,
cafily takes the impreffion of the part it is applied to.
But, as this only ferves to fhew the work by piece-meal, they
have recourfe to other methods to mew the whole figure.
The firft is by pouring melted lead on a piece of paper, and
clapping the matrice upon it; the fecond is with melted fulphur
managed the fame way ; the third is by laying a piece of foft
paper on the graving, and over the paper a leaf of lead, when,
giving two or three blows with a hammer on the lead, the pa-
per takes the impreffion of the work: But this is only proper
where the Engraving is (hallow.
When the matrix is quite finifhed, they temper it, rub it well
with pumice-ftone, and clean out the ftone again with a hair
brufh j and, laftly, it is polifhed with oil of emery : In this con-
dition it is fit for the mill, to be ufed to ftrike coins, medals, &c.
Engraving on feals, ftamps, puncheons, marking-irons for
goldfmiths, pewterers, book-binders, &c. either in relievo or in-
denture, is performed after the manner laft defcribed.
Engraving in relievo or in concave. There are feveral ways
of Engraving on metals and upon precious flones; for relievo's
are made both in the one and the ether, as well as graving in
concave.
When an artift would engrave on Heel to make medals, he
begins with defigning his fubjecl, whether an effigy or device,
which he cuts out on wax in bafib-relievo ; then he makes a
puncheon, and on one of thefe ends, which ought to be of cafe-
hardened fteel, he cuts out of relief the fame thing he made in
wax.
When the puncheon is in its perfection, he tempers it to har-
den it, and then, with a mallet or fome fuch inftrument, ftrikes
upon it to make the impreffion in a fquared piece of fteel formed
like a die; before which, he puts the fquared piece into the fire
to foften it, and make it more eafily receive the impreffion with
the puncheon ; for, being ftruck hot and cold, it receives in con-
cave what: is in relievo on one end of the puncheon.
reft of the medal, as the mouldings of the border, the ingrailed
ring, the letters, &c.
All which, particularly the letters or ingrailment, are perform-
ed with little fteel punches, well tempered and very fharp: And,
as they fometimes make ufe of puncheons to engrave the creux
of the matrix, fo on fome occafions they make ufe of the creux
of the matrix to engrave the relievo of the punch.
To examine and judge of the Engraving in creux, divers me-
thods have been devifed to take the impreffions from it, as the
work proceeds.
Sometimes they make ufe of a compofition of common wax,
turpentine, and lamp-black, which, always retaining its foftnefs,
cafily takes the impreffion of the part it is applied to.
But, as this only ferves to fhew the work by piece-meal, they
have recourfe to other methods to mew the whole figure.
The firft is by pouring melted lead on a piece of paper, and
clapping the matrice upon it; the fecond is with melted fulphur
managed the fame way ; the third is by laying a piece of foft
paper on the graving, and over the paper a leaf of lead, when,
giving two or three blows with a hammer on the lead, the pa-
per takes the impreffion of the work: But this is only proper
where the Engraving is (hallow.
When the matrix is quite finifhed, they temper it, rub it well
with pumice-ftone, and clean out the ftone again with a hair
brufh j and, laftly, it is polifhed with oil of emery : In this con-
dition it is fit for the mill, to be ufed to ftrike coins, medals, &c.
Engraving on feals, ftamps, puncheons, marking-irons for
goldfmiths, pewterers, book-binders, &c. either in relievo or in-
denture, is performed after the manner laft defcribed.
Engraving in relievo or in concave. There are feveral ways
of Engraving on metals and upon precious flones; for relievo's
are made both in the one and the ether, as well as graving in
concave.
When an artift would engrave on Heel to make medals, he
begins with defigning his fubjecl, whether an effigy or device,
which he cuts out on wax in bafib-relievo ; then he makes a
puncheon, and on one of thefe ends, which ought to be of cafe-
hardened fteel, he cuts out of relief the fame thing he made in
wax.
When the puncheon is in its perfection, he tempers it to har-
den it, and then, with a mallet or fome fuch inftrument, ftrikes
upon it to make the impreffion in a fquared piece of fteel formed
like a die; before which, he puts the fquared piece into the fire
to foften it, and make it more eafily receive the impreffion with
the puncheon ; for, being ftruck hot and cold, it receives in con-
cave what: is in relievo on one end of the puncheon.