La mia cuando la limpio también sale el Trapo negro eso será normal como dicen q son al humo

Looked like dry clay to me. You won’t get answers about their trade secrets though. That’s literally their secret.

@@ThePinkBinks Fair enough too. But I hate mysteries lol.

Kayenne54 Same here yeah. Unfortunately trade secrets are a person’s bread and butter and crafts people are always used if they let on what they are. Thing is though: this is a marketing video. Maybe the crafters are happy to share. It’s an ancient technique known around the world so you might find more info that way. Scroll down the other comments and you’ll see people posting alternative names for this pottery in their local culture. I’m pretty sure that powder was the same grey sieved clay they make the pots out of as it wouldn’t make sense to me to use anything else. It looks exactly like dusting the board with flour before rolling bread dough and for the same reason. It’d give a nice smoothness to the side facing the board that would then transfer to the mould without getting micro cracks in it. At least that’s what I think. I’m no expert obviously but it’s a mystery I’d like to figure out as it may come in very useful.

Ceramic hob. Say that again. Ceramic… hob. Hot stone on stone of a similar type like that equals cracks. You’re gonna break them.