Watchmakers' and jewelers' practical receipt book. A workshop

136 Pages·2010·6.68 MB·English

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UNITED STATES OF AMERICA.

WATCHMAKERS' AND JEWELERS'
Book
Practical Receipt
A WORKSHOP COMPANION.
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COMPRISING FULL AND PRACTICAL FORMULAE AND DIRECTIONS FOR
SOLDERS AND SOLDERING, CLEANING, PICKLING,POLISHING,COLOR-
ING, BRONZING, STAINING, CEMENTING, ETCHING, LACQUER-
ING, VARNISHING, AND GENERAL FINISHING OF METALS,
AS APPLIED TO THE WATCH AND JEWELRY TRADE.
TOGETHER WITH ALL THE IMPORTANT ALLOYS
USED BY THE TRADE AND MANY
MISCELLANEOUS RECEIPTS.
COMPILED FROM PRIVATE FORMULAE.
CHICAGO:
GEO. K. HAZLITT & CO., Publishers.
1S92.
COPYRIGHTED, 1892,
BY
GEO. K HAZLITT &r CO.
WATCHMAKERS' AND JEWELERS'
Practical Receipt Book.
CEMENTS.
Amber Cement.
i. Moisten the broken edges of the amber with a solu-
tion of potash and press them together and keep in this
position until dry.
2. Heat slightly the broken surfaces, apply a small por-
tion of shellac to the warmed surface and press closely
together. After allis dryremove the superfluous cement
by means of a sharp knife and polish with a flannel rag
and oil.
3. Heat the broken surfaces, apply boiled linseed oil
and press firmly together until dry.
4. Mastic melted in boiled linseed oil and appliedtothe
broken parts is said to make a perfect joint.
Jeweler's Armenian Cement.
1. Melt one part of thick isinglass glue, mix with one
part of thick mastic varnish and keep in a well corked
bottle. To use, heat in hot water.
2. Soak isinglass in water and dissolve in 2 oz. of spirit
to form a thick paste; dissolve 10 gr. of pale gum
ammoniac in this by rubbing well together. Add to this
WATCHMAKERS AND JEWELERS
4
six large tears of gum mastic dissolved in the smallest
possible quantity of alcohol.
3. Dissolve six pieces of gum mastic the size of a pea
in as muchspirits of wine as will sufficeto render it liquid.
Dissolve two oz. of isinglass in water,pouroffthe super-
fluous liquor and dissolve in rum, adding 10 gr. of gum
ammoniac,whichmust be thoroughlyincorporatedby rub-
bing in with the liquid until dissolved. Mix this with the
gum mastic, using heat. Put up in a closely stoppered
bottle and when about to use heat the bottle in hot water.
This cement is said to be very effective in uniting all sub-
stances, even glass to polished steel.
4. Keller's Armenian cement. Soak for twenty-four
hours ^oz. of isinglass in 40Z. of water; evaporated in a
water bath to 2 oz; add 2 oz. alcohol and strain through
a linen cloth. Form' a solution of % oz. best mastic and
2 oz. alcohol and mix while warm with the above. Add
to this 1 drm. gum ammoniac and mix until thoroughly
incorporated. Avoid thelo.ss of the spiritby evaporation
as much as possible.
5. Ure's Armenian cement. Water 6 oz., isinglass ioz;
boil to 3 oz., and add i}4 oz.; rectified alcohol, boil for a
minute or two, strain and add while hot, first a milky
emulsion of ammoniac, }4oz., then 5 drm. tincture of
mastic.
Acid Proof Cement.
1. Quicklime and linseed oil mixed to a stiff paste
forms a hard cement which resists both acid and heat.
2. India rubber melted by gentle heat is mixed with
from 6 to 8 per cent, by weight, of tallow, stirring well
the while; dry slacked lime is now added until the mass
assumes the consistency of a thick paste now add 20 per
;
cent, of red lead which will make it harden and dry.
.
PRACTICAL RECEIPT BOOK.
5
3. Mix a concentrated solution of silicate of soda with
powdered glass to form a paste.
4. Melt 25 grm. ofoldgutta percha, previously reduced
to shreds, and mix with 75 grms. of powdered pumice
and then add 150 grms. of Burgundy pitch. This cement
will be found useful for lining troughs used in galvanop-
lastic manipulations and will resist sulphate of copper
baths but not cyanides.
5. Melt one part India rubber with two parts lin-
seed oil; add sufficient white bolus for consistency.
Neither muriatic nor nitric acid attack it; it softens a little
in heat, and its surface does not dry easily; which is
produced by adding one-fifth part of litharge.
6. Sulphur 100 parts, resin 2 parts, tallow 2 parts
Melt and add sifted ground glass until brought to the
proper consistency.
Alabaster Cement.
1 Finely powdered plaster of Paris made into a paste
with water. This cement may be used to join and to §t
together pieces of alabaster or marble, ortomend broken
plaster figures.
2. Melt rosin, or equal parts of yellowrosin and bees-
wax, then stir in half as much finely powdered plaster of
Paris. This cement is used to join alabaster, marble, and
other similar substances that will bear heating.
3. Melt alum and dip the fractured faces into it; then
put them together as quickly as possible. Remove the
exuding mass with a knife.
4. To y2 pint skimmed milk add /x2 pint vinegar and
mixthe curd with the white of five eggs well beaten, and
sufficientpowderedquick-lime siftedin, stirring constantly,
to form a thick paste.
6 watchmakers' and jewelers'
5. Prepare a thin paste by boiling rice to a pulp or
using rice flour and hot water and thicken this paste with
finely powdered quick-lime. Slightly heat the fractured
surfaces, apply and place in a warm spot until dry.
Cement for Leather.
1. Take equal parts of isinglass and glue and add
enough water to cover. Let this soak for ten hours
and then bring to a boil and add pure tannin until the
mixture becomes stringy or like the white of eggs.
Rough up the surfaces of the leather to be united and
apply the mixture hot to them. Place the joint under
pressure of heavy weights for a few hours and it will be
found that a joint has been made as strong as the leather
itself. This will be found to be an excellent cement for
joining flat lathe belts, draw skins, etc.
2. Shred or cut into small pieces pure India rubber.
Select a wide mouthed bottle with glass stopper and fill
about one-tenth full of the shreds and fill the bottle with
pure benzine, which is free from all oil. Allow the mix-
ture to stand until the benzine has thoroughly cut or dis-
solved the rubber. If too thin, add rubber and if too
thick, benzine. This cement will be found excellent for
fastening small belts or joining other pieces of leather or
rubber.
Cement for Bisque Figures.
Carefully wash and dry several oyster shells,burn well,
slack in the air and reduce to a fine powder in a mortar.
Pass through a fine sieve and mix with the white of egg.
Clean thoroughly the fractured surfaces, heat slightlyand
apply the cement keeping the parts wellpressed together
for a few minutes until dry.