Nana....if you are using 'one' batch 'split', take your soap to a lighter trace, pour a layer and then colour and pour a shallow layer of the second colour. Wait till the remaining batch in the bowl thickens just for a moment or two. How long you wait determines the amount of 'mountain' effect. Then pour again and fill your mold. If you are making two separate batches, same thing..pour first colour, then take the second batch to lighter trace..pour a layer, let the batch in the bowl thicken to where you want it to be and pour. You'll never have 'bubbles' in your layers again
Lorie