[filmscanners] RE: HP PhotsSmart - questions

["Laurie Solomon" <laurie@advancenet.net>]

> 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,
saying to be careful not to let any of it run off the glass into the innards
of the scanner, and following it with the statement:
> >As for the other parts, you need to be careful not to scratch or leave
lint on the
> >surfaces of the optics and mirror.  I suspect that one would also need to
be careful
> >about what solutions one uses to make sure that they do not leave their
own film residue
> >over the optics and mirror, don't contain anything that will deteriorate
the internal
> >parts, and do not damage the electronic components and elements.

> Electronics grade alcohol is generally accepted as best for
> optics.

I am unfamiliar with electronics grade alcohol; how does it differ from
denatured alcohol?  I understand why one might not want to use rubbing
alcohol' but is denatured alcohol the same as electronic grade?

>I use cottonballs rather than cloth.

I suppose they could work just as well as long as they do not leave behind
any form of lint or cotton strings or dust.

> -----Original Message-----
> From: filmscanners_owner@halftone.co.uk
> [mailto:filmscanners_owner@halftone.co.uk] On Behalf Of lists
> Sent: Saturday, August 06, 2005 12:43 PM
> To: laurie@advancenet.net
> Subject: [filmscanners] Re: HP PhotsSmart - questions
>
> 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 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
> should start
> >by cleaning the glass bed with a soft lintless cloth and a little
> >Windex, being careful not to let any of the liquid run off the glass
> >and into the internal areas of the scanner.  As for the other parts,
> >you need to be careful not to scratch or leave lint on the
> surfaces of
> >the optics and mirror.  I suspect that one would also need to be
> >careful about what solutions one uses to make sure that they do not
> >leave their own film residue over the optics and mirror,
> don't contain
> >anything that will deteriorate the internal parts, and do not damage
> >the electronic components and elements.
> >
> >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 ( and if the
> >latter, what type of print laser, inkjet, etc.)  The answer to this
> >could furnish some indications of the reasons for this.
> >
> >----Original Message----
> >From: filmscanners_owner@halftone.co.uk
> >[mailto:filmscanners_owner@halftone.co.uk] On Behalf Of
> >rkoziol3@comcast.net
> >Sent: Saturday, August 06, 2005 8:37 AM
> >To: laurie@advancenet.net
> >Subject: [filmscanners] HP PhotsSmart - questions
> >
> >
> >
> >>Hi,
> >>
> >>Been reading the posts here for quite some time.  Just got into
> >>scanning.  In fact the recent thread on Cheap Film Scanners
> woke me up
> >>:-)  I have one that's at the bottom of that heap.  It's HP
> PhotoSmart
> >>vintage 1997.  SCSI interface, which makes it S10 I guess.
> >>
> >>I'm using the current version of HP software from their
> Support site.
> >>Did a calibrate with a white piece of paper (the card is gone). The
> >>scanner was donated by a friend.
> >>
> >>Now the question.  I started with a simple color print
> (3x5) scan and
> >>noticed that setting it to 150dpi gives a "sharper"
> >>result than 300dpi.
> >>
> >>Can that be explained in any way?  Saved as bmp and jpg,
> same results.
> >>
> >>Secondly, should I take the scanner apart and attempt to clean any
> >>optical components?  I'm quite handy with small tools :-)  After
> >>sitting for so many years and some usage by the previous owner, it
> >>must have some film whatever the optical pickup is.
> >>
> >>Regards,
> >>
> >>Rich Koziol
> >>
> >>--------------------------------------------------------------
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> >>
> >>
> >
> >
> >
> >
> >
> >
>
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