I never did soap but I read somewhere that you can use Mod Podge to stick the design on the soap and I heard about wetting the soap that it will be soft en press the design in the soap.

Years ago, if I remember correctly, when we did printed pictures on soap, we used melted parafin wax on the top - brushed on several coats. I think that would work with embroidery designs also. It would probably take more coats due to the thickness of the embroidery. I tried making the soap with the boughten chunks and the molds. I didn't enjoy doing it, but then I am not a soap maker :-)

Probably cheaper than Mod Podge and you may even have some wax on hand. Just use care melting it - check directions.

Years ago, if I remember correctly, when we did printed pictures on soap, we used melted parafin wax on the top - brushed on several coats. I think that would work with embroidery designs also. It would probably take more coats due to the thickness of the embroidery. I tried making the soap with the boughten chunks and the molds. I didn't enjoy doing it, but then I am not a soap maker :-)

Probably cheaper than Mod Podge and you may even have some wax on hand. Just use care melting it - check directions.

I did some in the past and I used an acrylic glue that is white but becomes transparent when it dries. Perhaps it is the equivalent to your Modge Podge. One must apply 4 coats, brushing each one in a different direction (left-right;up-down;righ-left;down-up)allowing it to dry some time between layers. It did work very well.

I embroider small fsl flowers . Do the usual rinse thing then when wet & gooey i place on the soap. Press into place and let dry. Have done these for stalls wrapped in clear wrap with a matching color and design on wash cloth. A note underneath then saying you can use the soap, but the emb will come off. Giving instructions to lye flat then add a ribbon when dry to use as a b/mark. 2 for the price of one. Hope this helps :)

I place my embroidery design on the soap while it is still wet and it adheres well. After the design is completely dry I dip my soap in melted parafin and it seals the soap. Of course the soap cannot be used after that but I make them for decorations not for use. :)