Bottle slumping directions

coat your mold with a good kiln wash - let dry

place in kiln and heat up to 1100*F slowly and soak for about 10 minutes.  Slowley increase the temperature about 500 degrees per hour ~ the soaking time allows the glass to equalize.    If you heat up the kiln too fast, the bottle is likley to thermal shock, so it is better to heat slower.

Continue heating at about 200-250 degrees per hour to 1475*F.  Hold that temperature until you get the results you want, which should take about 10 minutes.

Next cool the kiln down as fast as possible to about 1100*F.  This will stop the bottle from flowing or changing.  I open and shut the kiln a couple of times to do this.

Now just let the bottle anneal and slowly cool down in the kiln and your done!