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Mensaje del debate Deposit on glass for framed photo - response to all
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Arthur Entlich  
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 Más opciones 15 sep 2006, 05:43
Grupos de noticias: comp.periphs.printers
De: Arthur Entlich <e-printerh...@mvps.org>
Fecha: Fri, 15 Sep 2006 10:43:47 GMT
Local: Vie 15 sep 2006 05:43
Asunto: Re: Deposit on glass for framed photo - response to all
There are several possible causes of this phenomenon.

The window cleaner has glycols in it.

The ink gasses off glycols for months after the print leaves the printer
(especially with Ultrachrome inks)

The way glass is manufactured today, and especially inexpensive glass,
it is rolled between two metal rollers to make the sheet.  These rollers
are oiled to keep the glass from sticking.  This oil can get integrated
into the surface of the glass causing both a pattern and sometimes a
slight undulation in the surface. It usually is only visible under
certain lighting angles, or when it is partially damp.

Art

Alan Justice wrote:
> Thanks for all the thoughts.

> I waited  3 days to two weeks after printing before mounting.  I use Epson
> Premium Glossy paper (is that "swellable"?), Epson ink.  (I never had
> significant problems with scratching using Epson inks, only with MediaStreet
> ink.)  I always frame immediately after cleaning the glass with Glass Plus
> or Windex.  I don't let the heat press touch the photo when drying (4 min.
> at 190 deg.) so there is room for moisture to escape.  I do that step with
> dry mount under the photo.  After drying I then immediately press.  I use
> acid-free dry mount, also press for 4 min. at 190 deg.  (longer and hotter
> than manufacturer-reccommended, but it just did not adhere with less.  I
> still get occasional bubbling months later.)

> The pattern of fogging on the glass suggests it isn't just fumes from the
> photo coming off: They would be relatively uniform in the space between the
> photo and the glass (created by 4-ply mat), and certainly not in the bizarre
> patterns I saw (vertical fuzzy bars about every inch and "brain surface"
> pattern, with "sulci" a few millimeters apart).  I suspect now that, even
> though I let the cleaner dry "completely," any invisible residue could have
> dried by contracting to a pattern, like crystals.  At that point, the
> fogging could be either from the cleaner alone, or from the photo.  If the
> latter, it deposits preferentially on the surface where there is cleaner
> residue.  So maybe everyone was right.  My training is as a scientist, so
> maybe I'll do a controlled experiment (e.g., clean only half the glass just
> before framing, use fresh vs. aged photos, etc.)

> --
> - Alan Justice

> "Alan Justice" <s...@spamspamspam.spam> wrote in message
> news:pmhOg.7567$v%4.1572@newsread1.news.pas.earthlink.net...

>>Twice now (out of many dozens of pictures framed) I've seen a cloudy

> deposit

>>on the inside of the glass over the photo (not over rag mat).  It's in a
>>regular pattern (one was vertical fuzzy stripes, the other like the

> pattern

>>of a brain).  My best guess is it's something in the ink.  Cleans off

> fine.

>>Epson 2200, Epson ink.  I let them dry a few days, then dry 4 minutes

> under

>>a heat press (not touching) before mounting with dry mount.  I clean the
>>glass meticulously with Glass Plus, and use a paper backing on the frame.
>>I'm in a wet area (N. California coast), but it isn't moisture, as it

> stays

>>in that same pattern for weeks.  No direct sunlight.  Any guesses?

>>--
>>- Alan Justice


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