DOI Seite / Zitierlink:
https://doi.org/10.11588/diglit.19574#0019
A MA 7
If your paper is very thin and Ioofe, then warn it with this
Allum-water fpur or five times, letting it dry between every
time; and your paper muft always dry before you lay on any
of your colours. •
But take notice, that, if you defign to varniih your prints
after they are coloured, then warn the prints all over equally
with white ftarch before you colour them, and, when that is dry,
lay on the colours.
The method of ALU MING of fluffs^ particularly for dying
reds. Hang rain or running water over the fire, adding one
third part of the ftarch or bran-water; put in for every pound
of fluff two ounces of alum and an ounce of tartar, and, when
it boils and froths, firft fkim it, and then put in the fluff, ftir
it very well about for an hour, then take it out and rinfe it.
The quantity of alum muft always be double to that of the
tartar ; fome dyers reject red-wine tartar, and ufe only white ;
others efteem the red better, efpecially for crimfons, and all
forowni£h-red dyes ; and indeed it is very good in all good fluffs,
that require a little red preparatory ground, before they are dyed
black.
AMALGAMA, is a mafs of mercury united and incorpo-
rated with fome metal.
The Amalgama of mercury with lead, is a foft friable fub-
flance of a filver colour. See LEAD.
By wafhing and grinding this Amalgama with fair warm
water in a glafs mortar, the impurities of the metal will mix
with the water, and, by changing the water and repeating the
warning again and again, the metal will be further and further
purified.
Dr. Boerhaave fpeaks of amalgamation, as one of the greatefl
fecrets in chymiftry, to contrive to bring off the water at laft
as clear and unfullied as when firft poured on the Amalgama,
which might afford a method of making the nobler metals, or
procuring them from the bafer.
This philofophical way of purifying metals may be applied
to all metals, except iron and copper.
AMALGAMATION, is performed by fufing, or, at leaft,
igniting the metal j and, in this flate, adding a proportion of
mercury to it; upon which they mutually attract and incorpo-
rate with each other.
Gold unites and amalgamates with mercury with the greatefl
facility, next to that of filver, then lead and tin, and all me-
tals except iron and copper.
The Amalgamation of gold is performed by heating the la-
minze, or plates of metal, red-hot, and afterwards pouring
quickfilver on them, and then ftirringthe mixture with a little
B 4 iron
If your paper is very thin and Ioofe, then warn it with this
Allum-water fpur or five times, letting it dry between every
time; and your paper muft always dry before you lay on any
of your colours. •
But take notice, that, if you defign to varniih your prints
after they are coloured, then warn the prints all over equally
with white ftarch before you colour them, and, when that is dry,
lay on the colours.
The method of ALU MING of fluffs^ particularly for dying
reds. Hang rain or running water over the fire, adding one
third part of the ftarch or bran-water; put in for every pound
of fluff two ounces of alum and an ounce of tartar, and, when
it boils and froths, firft fkim it, and then put in the fluff, ftir
it very well about for an hour, then take it out and rinfe it.
The quantity of alum muft always be double to that of the
tartar ; fome dyers reject red-wine tartar, and ufe only white ;
others efteem the red better, efpecially for crimfons, and all
forowni£h-red dyes ; and indeed it is very good in all good fluffs,
that require a little red preparatory ground, before they are dyed
black.
AMALGAMA, is a mafs of mercury united and incorpo-
rated with fome metal.
The Amalgama of mercury with lead, is a foft friable fub-
flance of a filver colour. See LEAD.
By wafhing and grinding this Amalgama with fair warm
water in a glafs mortar, the impurities of the metal will mix
with the water, and, by changing the water and repeating the
warning again and again, the metal will be further and further
purified.
Dr. Boerhaave fpeaks of amalgamation, as one of the greatefl
fecrets in chymiftry, to contrive to bring off the water at laft
as clear and unfullied as when firft poured on the Amalgama,
which might afford a method of making the nobler metals, or
procuring them from the bafer.
This philofophical way of purifying metals may be applied
to all metals, except iron and copper.
AMALGAMATION, is performed by fufing, or, at leaft,
igniting the metal j and, in this flate, adding a proportion of
mercury to it; upon which they mutually attract and incorpo-
rate with each other.
Gold unites and amalgamates with mercury with the greatefl
facility, next to that of filver, then lead and tin, and all me-
tals except iron and copper.
The Amalgamation of gold is performed by heating the la-
minze, or plates of metal, red-hot, and afterwards pouring
quickfilver on them, and then ftirringthe mixture with a little
B 4 iron