Hello all,
I can't figure out what's causing some very deep and fairly long (ranges anywhere from half inch to two inches) scratches on the scanning glass. They're very thin in width and show up randomly around the scanning glass. I've already had the glass replaced once at a not-so-cheap fee (about $400 with parts and labor). The repairman left the old scratched glass plate with me, and I've tried my best to recreate the scratches using box cutter blades, scissors, paperclips, etc on it. I have to exert incredible force with the blade on the glass to even create a surface scratch, much less as deep as the ones that are on the scanner now. The glass is very well tempered and coated, as far as I can tell, and designed to prevent these scratches from happening.
If box cutter blades used with strong force can't make a decent scratch on the scanner glass, then dust/edges of photographic paper shouldn't do anything either. The scratches do show up in scans, and I'm using the scanner for archival, high resolution scans at a library where I'm working. Thus, I scan a high volume of photographic prints and historical documents (lettersheets, daguerreotypes, large posters, etc). But I can't think of anything that would cause scratches like this, if very sharp blades can't even reproduce the problem I'm having.
Anyone have any ideas as to what might be causing the scratches? I'm going crazy here!
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