19" Sink Master Mold

The results were good from our first slump. We were able to slump in a single firing. The glass slumped straight down and came out satisfactory in every respect.

Glass fused:

1 - 19" round Uroboros transparent

2 - 19" round Uroboros opal

After slump:

17 3/8" round 4" deep

Kiln used:

Jen-Ken oval with side and top firing elements

We also kiln washed the mold because the glass slides down the sides of the mold.

Firing Schedule

Bullseye has some good tech notes on the annealing.

2nd Slump

Our second slump was conducted exactly as our first sink slump except we used 4 sheets of glass. We used the same kiln and firing schedule.

The only difference we would make is holding for a longer period of time at 1,200 degrees. We held at 8 minutes so the next time we will go for ten minutes.

We tried to drill the glass with a diamond bit hole saw. Big mistake. The sinks broke every time... We discovered sandblasting the hole. I have spoke to a couple of people who can cut a hole without issue.

19" Sink Master Mold 5 layer

Glass fused:

1 - Top Clear - 18 3/4" round

2 - Clear Irid - Irid down - 18 5/8" round

3 - Turquoise - 18 3/4" round

4 - Turquoise - 18 7/8" round

5 - Turquoise Irid down - 19" round

Kiln used:

Jen-Ken round with side and top firing elements

We also kiln washed the mold because the glass slides down the sides of the mold and we want the best chance of success with this many layers of glass.

Slumping Firing Schedule Used