Melodiousdirge asked about our findings on glow in the dark silk screening and rather than pm him I figured I'd post this for anyone interested. Note: ready mixed glow screen printing inks are available, but are very expensive and I had doubts about quality since most commercial glow paints leave a lot to be desired as far as the glow.
Ink - Ryonet mixing base. This is a clear non acrylic sceen printing ink. Can also be used to create your own colors with pigments.
Glow powder - Super Phos Green From Glonation - http://www.glonation.com/glow-powder.php
Screen - 110 mesh
Mixing - We found 1.25 ounces of glow powder to 5 ounces of mixing base to be optimal as far as glow and ease of use. Adding more may improve the glow but might necessitate a different screen mesh as there would be more solids in the ink. We measured them precisely with a digital scale accurate to .1 ounce. Mix up no more than needed at the time as it likely won't store well over extended periods.
The glow ink is nearly invisible in normal light, but does have a slight color so we screened and flash set the glow ink first.
The second screen is opaque and does a pretty good job of covering any overlap with the glow ink isf you get careless with the screen design or registration.
I wore the shirt all afternoon and the glow was plainly visible for hours after dark. I have not timed the total glow duration but it was still glowing after about 4 hours when I went to sleep.
The stated light charging time for this powder is 10 - 15 minutes, and they claim it glows for 15 hours but I have not tested that.
When choosing colors be careful - some colors have a very short glow duration (15 or 20 minutes). Luckily we needed green which has the longest duration.
The actual printing was done on a 4 station silk screening machine, although we only used 2 stations.
I think that about sums it up, if you have further questions I could ask my son since he is in the screen printing business.

