I have a question... How long is too long between the two batches? I made my layered batch last night and unmoulded today. Haven't cut it yet. Off to work tomorrow for a 14hr day so my next decent chance to finish it is in a couple days time. Should I wrap the layered batch or will it be fine?
If you wrap the layered soap tightly in plastic kitchen wrap (like Saran Wrap), it will not dry out as quickly. Think in terms of soap dough - it is kept in an air tight container and it remains pliable. I did just that with some soap and kept it air-tight wrapped for 9 months. I had originally planned to add a thin layer of soap batter in a contrasting color for an Intaglio design. but did not get around to it for whatever reason. But I did do a soap welding experiment with the soap to test out welding pieces of soap together and the pieces adhered together extremely well. So you should have no trouble welding the getting your two sides to stick together after you unwrap the first from the plastic wrap. For more information about the soap welding technique see these links: Aug 2019 post; Sept 2019 post. Photo of welded soap. Post when I first wrapped the soap.
PS: I had no trouble cutting the long loaf into bar size soaps 9 months after it was made; it had been tightly wrapped in plastic wrap the entire time.
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