Phosphorescent Ink

[A.P.R.M. OSTEROP at TCH]

Hi to everybody,

I am looking for phosphorescent ink as a replacement for ink spiked with 
free label to mark my nitrocellulose blots before autoradiography. There is 
one company (DuPont) who sells a pen containing phosphorescent ink but it 
costs DFl.1000.- (~$600.-) wich is to expensive for me.
Does anyone know a company who sells phosphorescent marker pens or just ink 
wich can be used in autoradiography and is afordable? Please let me know!

ÿWPC7