I'm planning to build a screen (around 80" 16:9) with a hardboard. I found out that they sell here (in Lithuania) a Finnish acryl paint called "Tikkurila Harmony H499", which should be a good paint colour for screens. After reading this forum I learned many things. But, at the same time, many more questions raised in my mind. If I understand correctly, by mixing some addectives to the paint I should be able to increase the screen gain. My only (yeah, right
) problem is that I don't quite understand what they are. So would someone please be able to give me the full names or explenations what they are, so I could try to explain for the sells person what I'm trying to purchase. If you would know the chemical sings, that would be even better, since my Lithuanian is not that good (I only work here).
Thank you.

Thank you.