Oil Cavities

[Kamahido]

I'm seeing these oil cavities online more and more lately. Is there a more technical term for them other the Oil Cavities? And what is causing them? Localized separation, internal heat/pressure, or something different entirely?

https://preview.redd.it/stxbj65s73p...bp&s=dca1093ba0473a95e4ec76d87586ae7df3bdb267

 

[AliOop]

Those look like heat tunnels to me. They are caused by overheating, often with added milks, honey, or other ingredients that heat up batter quickly.

 

[cmzaha]

I agree it is from overheating, either from honey, milks or the biggest culprit for this type of overheating is a naughty FO or spicy, such as clove EO's.

 

[Kamahido]

The picture linked was of a 100% Coconut Oil soap, so the heat was most likely quite high. But I still can't figure out why it would separate like that into an oily cavity.

 

[AliOop]

The picture linked was of a 100% Coconut Oil soap, so the heat was most likely quite high. But I still can't figure out why it would separate like that into an oily cavity.

^ see Carolyn's reply, above. The most likely culprit is an FO, but milks and honey can also cause this. My only heat tunnels happened in a cylindrical mold made out of black ABS pipe (quite an insulator), in a recipe that contained molasses, which heats up worse than honey. Looked like a worm had been eating through my soap!