[Las Vegas Ron]

Ron, I can tell you where those halos come from.

Thanks for your help. As I mentioned I am no expert in this so I can only go by my experiences.

I do work with PS for web purposes so I'm not totally inept.

I still wonder though why I don't get halo effects on my scans.

[editor-surveyor]

>> “I still wonder though why I don’t get halo effects on my scans.” <<

.
Lots of variables.

Type of illumination the scanner uses, color of background, color of text, overall contrast.

I get more problems with changes in resolution than with scanning. Most scanners these days are capable of very high resolution and color recognition, and scanning halos should be minimal unless the light source is defective resulting in improper color and shade recognition. The brighter and whiter the light, the less artifacts you should be getting.