Quote Originally Posted by Francesco

Once under the glass what kind of bulb do you use to expose your negatives, if printing in AZO? If PtPd? How high is the bulb to adequately cover the negative. Apologies for my inquisitiveness.

The light is a whole different matter for printing with AZO as opposed to alternative processes like Pt/Pd that require a light source high in UV radiation. For AZO stuff go to the AZO forum. For UV printers have a look at my article at http://unblinkingeye.com/Articles/Light/light.htm.