- Clear shower curtain or other plastic sheeting - I don't think it matters how thick or thin it is, as long as it holds up to your display method.
- Liquid laundry detergent - the brands I have tried are All, Tide & Whisk. You may want to test yours first to be sure is has the proper UV reactive additives.
- Rag, sponge, or sponge paint brush - the tool will depend on how precise you want your image.
- Blacklight bulb
Step 1: Paint your ghost
Lay out your plastic sheeting on a flat work surface. You don't need to do much to protect the area, as the soap is easy to clean up - making it a perfect decoration for kids to help assemble.
I poured a bit of soap into an empty cream cheese container; just the right size for my brush, easy to dump the leftover into my next load of wash.
Paint on your ghostly apparition. I would recommend having the black light on during this process. I painted my ghost under normal light and really had no idea what shape I was getting. The soap, though it appears blue in the container, is colorless when sponged on.