@blue54899
I agree with
@dibbles and
@Lidiacgarcia . That is a single cavity mold with the design as part of the mold. But, you can do this in any single cavity mold with or without a design in it.
Although I'm a beginner and don't really recognize names of ingredients after saponification, it looks to me like it is melt and pour. I found the ingredients for Olivu 426's Oatmeal, Milk & Honey soap. A little different than
@Lidiacgarcia 's post. I don't think I spot "honey" in the list????
Ingredients: Glycerin, propylene glycol, sodium cocoate, goat's milk, oatmeal powder, water, sodium stearate, sorbitol, sodium myristate, tocopherol, titanium dioxide, iron oxide, fragrance
But, I digress. I have done this with Melt & Pour. As
@dibbles and
@Lidiacgarcia said, just mix a small amount of base to which you will add the ground oatmeal (which you can grind yourself.) or oatmeal powder. Pour a thin layer on the bottom center part of the mold. Then immediately, before it cools, pour in some base that does NOT have ground oatmeal. Do not pour from high, pour really close to the mold so that the new hot soap base doesn't completely push away the first layer. You only want to disburse the first layer a little to the sides.
If you pour from high, it will completely push away the first layer and you'll probably end up with a more defined ring of the oatmeal base with the non colored batter staying in the center.
The ground oatmeal will discolor the base slightly. That's how you get the two toned look. If you want to be sure there is a little discoloration, add a fragrance that contains vanilla to the oatmeal base. That should get you this look.
Although I have only done this with M&P (where I do a two tone very gentle swirlish disbursal,) I think you can also do this with cold process, too. Just pour the first small amount of batter at a thin trace. Probably the second batter as well. If you grind your own oatmeal, it should be really fine. Take out any little pieces that look bigger as they will swell just a little in the finish product and the specs will not look as small as you see them on the Olivu 426 soap you posted.
If you give it a try, post your results!! I'd love to see how it turns out!!!