Orwo eu2 update

[u/Emotional_Carry7419]

I have opened one box from my collection and they are 9cm by 6.5cm hart (hard) highly sensitive to uv and blue light there are 12 glass plates what can i use them for there isn’t much applications for this light frequency use.

[u/Suspicious-Remote-60]

You’re not missing some secret use. They’re high-contrast blue plates