Instruction manual

OPERATING_MANUAL_MC20V.DOC 18.03.11 KS Seite 24
3.13. To find out the weight of the metal
ALL rubber bases must be determined on a scale. Write exact weight on this rubber
bases by a felt pen.
After mounting the tree, take the total weight. Deduct the rubber base weight from the
total weight = net wax weight. To simplify matters we assume the specific weight of
wax as 1.
Metal weight is calculated by multiplying wax weight by the specific weight of the
metal:
Metal
Spec. weight g/cm³
Water, wax
1,00
Aluminium
2,70
Steel
8,50
Brass
8,40
Bronze
8,80
Silver
10,50
Nickel silver
8,40
Gold 333
10,50
Gold 585
13,70
Gold 750
15,20
Gold 900
17,40
Palladium 950
12,00
Platinum 950
20,70
Example:
Complete weight (wax + rubber base) 43,5g less weight of rubber base 38g = 5,5 g
wax
5,5 g wax means
Metal
Wax weight x Specific weight
Metal weight
Silber
5,5 g x 10,5
57,75 g
Gold 750
5,5 x 15,20
83,60
After the calculation: Place flask cylinder and fix it carefully on the rubber
base. Do not touch wax pieces.