GC EUROPE Fujivest Super - Manual (Page 37)

37
Focus Edition from GC
Cause Remedy
- Incorrect liquid concentration - To increase expansion, increase the liquid
concentration and to decrease expansion,
decrease liquid concentration (by diluting
with water). Do not dilute more than advised
, the use of too much water leads to
uncontrollable expansion level
- Incorrect powdrer/liquid ratio - Check liquid/powder ratio in instructions
for use and the accuracy of your measuring
equipment
- Low temperature of mixture, low room
temperature
- Optimal working temperature of powder and
liquid is 21-23°C for most consistent results
- Incorrect liner thickness - Use GC New Casting Liner to avoid the risk of
too little expansion
- Pattern material - Pattern material with lower melting point
(e.g. inlay wax) can produces larger castings
whilst higher melting material (e.g. Pattern
Resin) can result in smaller castings
- Pattern deformation - Handle wax pattern with extreme care,
wax-up under uniform temperature
conditions and allow the wax to rest to
create a stress free object
- Incorrect positioning/spruing of patterns in
the investment mould
- Ensure uniform thickness of investment
material around the objects to allow even
expansion. Review your sprueing technique
- Too fast cooling down of investment mould - Allow a slow cooling down of investment
mould before devesting
- Improper mixing - Check the Instructions for Use
7
Inaccurate fit of casting objects