1
$\begingroup$

What is a soap-like material that holds a solid shape, but dissolves completely in water over 10-15 minutes. Think disappearing Rubber Ducky.

$\endgroup$
2
$\begingroup$

Potassium soap is soft. Vary the sodium-potassium ratio to get what you want. Leave some glycerin in. Make the soap from polyunsaturated fats.

$\endgroup$

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.