Part 6 of the Investment Checkoff List Series we will cover using investment.
This is meant to serve as a reminder or quality-control list. The information in parenthesis is a possible condition which may result from lack of, or improper control of the parameter.
Breakout
- Time before breakout............................................Wait at least 15 minutes
- Method used dry, wet, hammering, etc. ..................Wait at least 15 minutes; dry hammering wait until flask is well below 600°F
Cleaning
- Pickles used..........................................................Avoid hydrochloric acid; safety pickles are good
- Concentration/temperature/duration in pickle.........Use minimum temperature, concentration, and time that will get the job done (any high may cause fractures)
- Cleanliness of tree after cleaning............................Investment should be completely removed in reusing metal
- Clipping methods..................................................Avoid bending pieces