Uploaded April 2019 | Updated September 2026, 1 week ago
After the investment has been poured into the flasks the air needs to be removed before the investment dries. Remember to release vacuum first and then turn off pump (opposite of what I did).
After the investment has been poured into the flasks the air needs to be removed before the investment dries. Remember to release vacuum first and then turn off pump (opposite of what I did).
