-----bubble bath-----
1 qt Water
1 Castille soap; grated
2 oz Glycerin
3 dr Perfume
-----rose bubble bath-----
1 qt Water
1 Grated castille soap
3 oz Glycerin
3 dr Lilac perfume
-----lavender bubble
-bath-----
1 qt Water
1 Grated castille soap
2 oz Coconut oil
1 oz Glycerin
3 dr Violet perfume; or
2 dr Violet floral oil

Any good soap can be used to make bubble bath, but castille generally is preferred. Before the soap can be made into bubble bath it must be converted to a liquid. To do this, grate 1 bar of castille soap into 1 quart of water, warm water helps dissolve the soap faster. Allow the soap and water to mix well so that you have a liquid soap solution. There are two ingredients that can convert liquid soap into bubble bath. These ingredients can be used together or independently of each other. An old-fashion way to make bubble bath is to add glycerin to liquid soap ( soap shaving and water.)
Glycerin has the ability to make bubbles and increase suds. Coconut oil is often used as a substitute for glycerin, which is usually much higher priced. Coconut oil is very effective at creating lather.
Both glycerin and coconut oil are known for their special skin-softening properties. Source:Making Potpourri Colognes and
Soaps;102 Natural Recipes

Val