Separation

[Annem]

I'm a bit embarrassed to ask the question. It's so basic.
What is the cause for separation of layers? It's never happened before. Should I have let the bottom layer harden longer (it bled into the 2nd layer) The top layer was 130 degrees F. and separated at the top level.
Also, I used two soap bases: shea and goat's milk. Should I have stuck with one?

 

[lsg]

For M&P soap, I usually let a layer form a light skin on top and then spray with rubbing alcohol before pour the next layer.

 

[Annem]

For M&P soap, I usually let a layer form a light skin on top and then spray with rubbing alcohol before pour the next layer.

I did that. Should it have been hard to the touch?

 

[lsg]

No, a light skin on the top is all that is needed.
https://www.soapqueen.com/bath-and-body-tutorials/5-tips-layering-melt-pour/

 

[Annem]

No, a light skin on the top is all that is needed.
https://www.soapqueen.com/bath-and-body-tutorials/5-tips-layering-melt-pour/

I like her layered soaps. I tried it again and made some changes: used goat's milk. I find it's easier to handle. Most important I let it cool to the tried and true 125 degrees instead of the recommended 135 degrees and I did let the bottom layer hardened to the touch. Success!