Re: BL light box 'blues'

["Christina Z. Anderson" <zphoto@montana.net>]

'OK, now let's go back to what Ken said....below.

My VDB exposure times are way less than cyano....maybe 5-8 minutes at best. 
My bulbs may not be 5" from the print, but they aren't too far off from 
that, and no inverse square law. I think this is fairly consistent across 
paper types, two exposure units, and 18 students per semester.

And that is low humidity in BZ in the winter/spring.

The only way to really determine if it is a neg prob is to print a 
Stouffer's alongside....hey Ken do you want to mail me a neg and I'll print 
it up by a Stouffer's for you??? If they print fine for me, then I might 
suggest a problem with your exposure unit?

btw I can print them in gum as well...
Chris



> hoped...  Cyanotypes seem to be requiring around 40 to 50 minutes  while I 
> have not
> yet reached the 'end-point' for acceptable VDB exposures, it seems as  if 
> 60 -70 minutes
> might be the absolute minimum.