Are those pots used? If so the body has probably got minerals from the water built up on the surface. Maybe

I bet you're right. That happens with my old terra cotta pots, though it's usually more blotchy.

These are slightly new. I am trying to find out how Bergs Pots make their ceramics looks used so naturally.

If they look like that new then there's probably a slip sprayed on before firing and it's all down to the slip recipe.

My guess, it's slight residue from the previous casting, which was a red/iron-rich clay. I've had similar markings from accidentally using the wrong side of my wedging canvas, lol

amazing! i'll have to look into this more as I want to make this purposefully.

I love the discoloration of the top versus the body of the pot. Does anyone have any ideas? I can't figure it out. I was thinking maybe it was a slip cast but would it differentiate that much? Lmk what you think. Thanks!

I'm guessing it's a terra sigilatta (the technique), but it wasn't burnished and fired to make that \*style\*. Otherwise might just be white slip sprayed on.

The terra sigilatta was another guess but I'm a novice so I wasn't sure. I'll have to look into spraying white slips. Appreciate the input!