Like requested by
@TashaBird, here comes the wash test for the
GitD soap – in the dark, of course! It's super fun but also a bit scary to not have regular lights, but use the soap bar as a torch instead, see your hands glow, and the suds splashing around in the sink are a huge mess! (They always are, but one usually just doesn't see this!)
The lather itself did glow, but not overly intense. A bit more of the pigment was stuck to the skin. Most light came from the soap itself.
I'm surprised how coarse that powder is. It did look powder fine out of the box, but you can really see the single grains, and there is no “smooth” glow throughout the whole bar/lather/hand/sink/sewage.
One thing that was a bit disappointing/annoying is the “charging”. The strontium aluminate really doesn't care much about visible light, and only strongly reacts to UV. I do have an UV light, but it'd be nicer if it were easier to charge up (like the ordinary zinc sulfide that would suck up any type of light). Supposedly there are great quality differenes between manufacturers/sources of GitD pigments, maybe mine just isn't the best preformer.
ETA: With the surface dried up, I put the bar back on the curing rack. It feels notably rough to the touch. Nearly a bit scrathy, as if someone had put fine sand into it.