After the firing

This is what a kiln load of pots looks like (well, except for the full box of special orders). Generally a very successful firing, still a hair more reduction than I'd like, but some parts of the kiln were absolutely perfect.

And the left front corner, by the door, is still oxidizing.

But I think I know why!

I remembered as I unloaded the kiln that, when I'd maneuvered the burners so I could vacuum out the crud and brick crumblies, that front burner had been much easier to access. Confirmed it with a closer look--that burner is at least an inch, maybe an inch-and-a-half further from the burner port in the kiln wall than any of the others. Which means there's a lot more secondary air entrained by (sucked in with) the flame on that port. We need to fiddle with the position of the burner, or else build some sort of baffle around to port to restrict how much air gets pulled into the kiln.

Alternatively, I could really restrict the primary air being pulled through the burner, by closing down the air shutter at the back of the mixer. (I think I need to do another technical entry, with photos. Maybe later.)

I think I'd prefer to move the burner in, rather than have to adjust it differently from the other three.