"T i m" wrote in message
...
On Thu, 9 Sep 2010 23:40:58 +0100, "Spamlet"
wrote:


When I was doing such for Kodak we stored the OPC drum in a black
plastic bag and generally out of bright light. The guy on the Youtube
vid didn't seem to bother?

Sounds an odd thing for something that has a hugely bright light shone on
it
everytime it cycles!

Hmm, good point, however, wouldn't it generally be illuminated equally
that way whereas if it sat in the sun facing one side?

Only if you are copying blank sheets of paper :-)

Possibly it's the immediate 'wiping' with high voltage that gets all the
electrons back in the right places; whereas in the sun they are ejected and
perhaps the coating deteriorates before they get back. Did read up on the
physics of all this when I stripped my first copier but that was a long time
ago...

Possibly, the black bags are reliably clean and dust
free inside.

Possibly, however I do remember mention of 'avoiding exposure to
sunlight' in particular so maybe it's something in sunlight that isn't
good for it shrug.

Or maybe it was just /the/ and stuff is bore durable now?

I'd say it is more fragile now and has to work harder. My first copier drum
was several inches diameter, and I think it had to be regularly given a wipe
over (IPA ?). Maybe only one or two turns for an A4 sheet, whereas today's
must do at least 4 I would imagine. I never wore out the drum on the copier
and it used to use toner by the litre. I just ran out of other spares in
the end: it was silicon rubber rollers on the fuser unit that kept getting
scored.

S

Cheers, T i m