[alt-photo] Re: Alternative Exposure Unit (no pun intended)

[Alberto Novo]

> I did an experiment that confirmed this. I cut up some  blue, green, 
> yellow, and red lighting gels into squares and mounted them on a 
> transparent sheet...

I don't know if this is a good experiment. Months ago, speaking about the 
best ink for blocking UV for negatives, at the end there was a general 
agreement that the visible color has no correlation with the opacity in the 
UV range. 

Alberto