On film cleaning-
If you hang around old camera shops(good gosh how I miss living close to Chuck Rubin's) see if you can snag a bottle of Kodak Film Cleaner. It's potent stuff but I think it works better than Pec cleaner, but of course hasn't been made in a while(IIRC, it's N-heptane or another light fairly pure hydrocarbon with a largish chlorofluorcarbon, so it's both ozone depleting and a greenhouse gas, but darn does it work well). I use Kimwipes, but TBH Pec Pads are probably the best thing around for it.
Still, dust is a never-ending enemy. It's why I bother with making sure I run my Nikon Scanners on Nikon Scan(which need 10.6.8 at the absolute newest) and don't use Vuescan because real Digital ICE is SO much better than Vuescan's algorithms(yes I will back that statement up if anyone wants to see it).
This is what I was saying.
You need a true full spectrum source. For viewing slides, something that is close enough that our eyes perceive it as full spectrum is fine. For scanning(or printing), though, if there are "notches" it's never going to be right. Incandecent is actually good since even though the intensity is a function of wavelength(and that distribution is Gaussian and directly correlates to the filament temperature) all of the wavelengths are there.
All of my enlargers are incandescent as well. Even with B&W, you can get into trouble with throwing off the contrast of your multigrade paper if the spectrum is bad in the wrong places.
If you hang around old camera shops(good gosh how I miss living close to Chuck Rubin's) see if you can snag a bottle of Kodak Film Cleaner. It's potent stuff but I think it works better than Pec cleaner, but of course hasn't been made in a while(IIRC, it's N-heptane or another light fairly pure hydrocarbon with a largish chlorofluorcarbon, so it's both ozone depleting and a greenhouse gas, but darn does it work well). I use Kimwipes, but TBH Pec Pads are probably the best thing around for it.
Still, dust is a never-ending enemy. It's why I bother with making sure I run my Nikon Scanners on Nikon Scan(which need 10.6.8 at the absolute newest) and don't use Vuescan because real Digital ICE is SO much better than Vuescan's algorithms(yes I will back that statement up if anyone wants to see it).
Just a thought on scanning colour negs. The light source must be full spectrum. Many light sources have portions of the visible spectrum which drop out to some degree or another.
This is what I was saying.
You need a true full spectrum source. For viewing slides, something that is close enough that our eyes perceive it as full spectrum is fine. For scanning(or printing), though, if there are "notches" it's never going to be right. Incandecent is actually good since even though the intensity is a function of wavelength(and that distribution is Gaussian and directly correlates to the filament temperature) all of the wavelengths are there.
All of my enlargers are incandescent as well. Even with B&W, you can get into trouble with throwing off the contrast of your multigrade paper if the spectrum is bad in the wrong places.