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below is the simple recipe i followed to convert solid bar soap to
liquid form. the soap used was plain, unscented, 100% castille made
using the normal cp process; the objective was as mild a liquid as
possible. i suspect that the weak lather of the resulting liquid could
be improved if the bar soap contains a small amount of coconut and palm
oils.
 | 2-½ cups | water | | combine
the grated soap, palm oil, and glycerin in simmering water in a double
boiler. cook until all the soap is dissolved. remove from heat. add the
vodka. let cool slightly, add fragrance, color, or whatever. bottle,
being sure to strain out any undissolved soap bits. | |
| 2 cups | castille bar soap (grated) |
| 1 tbsp. | palm oil |
| ½ tbsp. | glycerin (optional) |
| 1 tsp. | vodka |
| 1-½ tsp. | fragrance (optional) |
this recipe didn't disclose the rationale for the additions of the
palm oil or the vodka (alcohol). further testing may uncover the actual
reason(s). i suspect that the palm oil is for texture and emolience and
the alcohol is to help keep the bar soap dissolved.
this resulting soap was water-thin. adding more bar soap is not an
option since past experience shows that this only causes the mixture to
congeal upon standing. (one could resort to a thickening agent like
xanthan gum, etc.)
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bar-soap conversion