Soda Firing 6-24-25

This will be our 20th Kiln Firing. Everything brought by participants fit into the kiln.
No changes were made to the kiln setup/ stacking of the wares.

Follow along with the firing as I update this page on the hour.
Cones in our cone packs 012, 010, 06, // 1, 4, 5, 6, 7

Kiln Log:

I will log at the top of the hour here what temperature, gas, damper, and notes pertaining to the firing.

TUESDAY

  • 9:45pm - Estimated START TIME - South pilots/ burner lit.

  • 10:30pm - Top Temp 529ºF/ Bottom Temp 124ºF
    This is how temps will be written. Top/ Bottom. These are also graphed below.
    South Burner lit. 0.5# gas, air just below Low.

WEDNESDAY

  • 6:30am - 1366ºF/ 829ºF
    Bumped south burner up to 1#/ North burner to 0.5#, Damper at 1.5”, Air just above low

  • 7:30am - 1287ºF/990ºF
    Both Burners at 1#, damper at 1.5”, air at medium

  • 8:30am - 1325ºF/ 1110ºF - holding everything the same

  • 9:30am - 1461ºF/1232ºF - gas up to 2#, air at medium/ straight up, damper at 2”

  • 10:30am - 1600ºF/ 1420ºF - Holding everything at current settings

  • 11:30am - 1703ºF/ 1553ºF - bumped gas up to 2.5#, closed in damper to 1.5”, Air at Medium.
    Body reduction is in progress.

  • 12:30pm - 1746ºF/ 1639ºF - bumped gas up to 3#, opened damper to 2.5”, Air on high.

  • 1:30pm - 1849ºF/ 1750ºF - gas stays at 3#, opened damper to 3.5” Air on high

  • 2:30pm - 1919ºF/ 1830ºF - holding everything the same this hour.

  • 3:30pm - 1986ºF/ 1912ºF - the kiln is slowing down and evening out!
    I pulled the damper a 1/4” out so now it’s at 4.25”

  • 4:30pm - 2047ºF/ 1980ºF - holding everything as is.
    We will likely add soda between 6:45pm and 7pm. This can still shift. Stay tuned!

  • 5:30pm - 2104ºF/ 2047ºF
    Cone 4 is down on top/ not moving on the bottom.
    Opened the damper another small bit. It’s about 5” open at this point.
    There is back pressure out of the top and bottom peeps.
    It is very likely we will soda around 7pm. Hope to see you here.
    Let me know in the chat if you are coming!

  • 6:30pm - 2164ºF/ 2109ºF, the bottom is lagging a bit, but the kiln is fairly even otherwise.
    Cone six is soft on top. Soda-ing soon : )

  • 6:40pm - 2170ºF/ 2119ºF - started adding soda!
    We added 4 pounds of soda in two gallons of water.
    We sprayed in the soda in 4 second counts (different from last time at a tem count).
    I sprayed in soda on my own until folks arrived at 7pm
    The kiln only lost about 5 degrees with each spray instead of 20!
    We still got wrinkling in the sea green and raspberry glazes

  • Soda introduction took about 40 minutes. We reduced the kiln for about 5 minutes after introduction. Then let the damper stay open after we shut off the gas for an airy finish.
    Everything went well! Jody, Steph, Joe, & Katie!

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