http://www.durgan.org/URL/?LFDUQ 21 November 2010 Making Luffa Soap Cakes.
Experimental luffa soap cakes were made today. Pictures depict the process.
Ingredients are glycerin soap, isopropyl alcohol, dye, luffa, and various molds. Spraying the luffa with alcohol assists in binding the soap to the luffa. The ingredients are usually available in a craft store. I got mine at Michaels Crafts. Molds can be anything suitable. The process is simple, and only takes a short time.