Making a Mokume Ring Part 6

Vacuuming the flasks
After filling the flasks with investment, they are covered with a bell jar and subjected to a vacuum to remove any trapped air from the investment to prevent bubbles
Placing the flasks in the kiln
The investment is allowed to dry and then the flasks are placed in a kiln and the temperature is increased to melt out the wax and burn any wax residue from the investment
Placing the flask in the casting machine
After the complete burnout cycle in the kiln, the flask is removed and you can see that the wax has completely melted away leaving a cavity inside the investment in the shape of the wax. In this case, the cavity is the exact shape of the bezel we want for the diamond
Placing the flask in the casting machine
The flask is loaded into the casting machine which melts the gold in the crucible and once the gold is molten and at the correct temperature, the machine spins and the gold exits the crucible through the hole in the side and enters the cavity in the flask, creating our piece
The view through the sight glass into the crucible of molten white gold
The view through the sight glass into the crucible of molten white gold
The flask just after casting with hot white gold filling the sprue cavity
The flask just after casting with hot white gold filling the sprue cavity
The finished white gold casting
Once the flask cools sufficiently, the investment is removed and the casting pickled and we have the bezel attached to the sprue
Fitting the bezel to the Mokume Ring
The bezel is cut from the sprue and filed and sanded to fit exactly to the top of the mokume band