I do not have answers to the question of cleaning the internal optics,
mirror, or sensors; nor do I have an answer to why 150 dpi appears
sharper than 300 dpi when scanning a 3 x 5 color print. I take it that
this is a flatbed scanner.
I would suggest the obvious with respect to cleaning. You
Windex contains amonia which can etch coatings. Never use it on optics.
Electronics grade alcohol is generally accepted as best for optics. I
use cottonballs rather than cloth.
Laurie Solomon wrote:
I do not have answers to the question of cleaning the internal optics,
mirror, or sensors; nor
On 6 Aug 2005 at 12:06, Laurie Solomon wrote:
As for the question of why 150 dpi appears sharper than 300 dpi when
scanning a 3 x 5 color print, you did not tell us if the result you
speak of was on the monitor or on a hard copy print
At this point I'm just looking at the results on a 19inch
When I was in the camera repair business I used denatured alcohol cut
5-% with ether. The ether dispersed water droplets and promoted faster
drying. Other recommendations from factory repair houses included MEK
and distilled water with a drop or so of mild dish washing detergent.
Jim
lists
I had (still have one in a box somewhere upstairs) and
the calibration card was not a sheet of paper but
looked like a 5x7 glossy paper that one half white and
half black. You insert the white part first and then
the calibration occurs as it scans the black part. As
to cleaning the sensor, IIRC,
You are mistaken. I've communicated with the head of service for
Schneider Optics and Windex diluted 50:50 with water is the #1 thing he
recommends for cleaning lenses.
Most lens cleaners are water bases, not alcohol based.
Mr. Bill
lists wrote:
Windex contains amonia which can etch
Windex contains ammonia which can etch coatings. Never use it
on optics.
I assumed as much but was not sure, which is why I made a point of
articulating my suggestions the way I did and restricting my suggestion of
Windex's to the plate glass bed of the scanner if it were a flatbed scanner,
I am unfamiliar with the scanner. I assumed that since you said it scanned
prints it was a flatbed type of scanner. I do understand your concerns and
reservations. You might be able to get a repair diagram or other schema of
the unit from HP that will tell you how to take the unit apart and
They advertise Windex with Ammonia D. Of course it has ammonia. You
can find any number of references that state ammonia destroys coatings:
http://www.opticallabproducts.com/07/young.php
I don't even clean my car windows with windex. I use the same
electronics grade alcohol, especially if I'm
The water would have to be purified as well, else you would get mineral
deposits.
Mike Kersenbrock wrote:
[EMAIL PROTECTED] wrote:
You are mistaken. I've communicated with the head of service for
Schneider Optics and Windex diluted 50:50 with water is the #1 thing he
recommends for cleaning
The denatured alcohol I use is an industrial grade that does not have
the additives found in rubbing alcohol. besides staying away from
substances that will damage coatings (and magnesium fluoride is slightly
water soluble) the cleaner must not leave residue and should evaporate
quickly.
Jim.
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