Print stain from glass washing spray

Recently I've noticed a slight yellow stain on FB prints (untoned) mounted
in frame under a glass. I know that the glass was washed with glass washer
with ammonia. Could this cause a yellow stain on the paper?
J. Lapinski

noticed a slight yellow stain on FB prints

Left over fixer.

Larry

"Jerzy Lapiñski" wrote

Recently I've noticed a slight yellow stain on FB prints (untoned) mounted
in frame under a glass.

Yellow staining is due to not enough washing.

FB prints should be washed for 1.5 hours in running or frequently changed
(every 5-10 minutes) water.

Using a 'wash aid' reduces the washing time. In the US they go by the
names 'Hypo Clearing Agent', 'Orbit Bath', 'Washing Aid'....

If you want to make your own a common formula is:

Water 100-125 F 750 ml
Sodium Sulfite 200 grams
Sodium Bisulfite 50 grams
Water to make l liter

Use at 1:9 dilution.

I know that the glass was washed with glass washer
with ammonia. Could this cause a yellow stain on the paper?

No. The ammonia is all gone in seconds after cleaning the glass.
You can smell infinitesimal traces of ammonia - if it smells OK
then there is no ammonia.

--
Nicholas O. Lindan, Cleveland, Ohio
Consulting Engineer: Electronics; Informatics; Photonics.
Remove spaces etc. to reply: n o lindan at net com dot com
psst.. want to buy an f-stop timer? nolindan.com/da/fstop/

Well, the point is that prints that hasn't mounted coming from the same
darkroom session does't not show any yellow staining. Even test prints,
which were not fixed enought and were washed 30 sec. before drying in the
microwave, do not show any stain. The print were made od Ilford FB MG
paper, two bath fixer, and hypo clearing agent were used. The washing time
was over an hour in relatively warm water - about 26 deg. C.

What type of frame, and how are you mounting the photos?

--
darkroommike

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"Jerzy £apiñski" wrote in message
news
Recently I've noticed a slight yellow stain on FB prints (untoned) mounted
in frame under a glass. I know that the glass was washed with glass washer
with ammonia. Could this cause a yellow stain on the paper?
J. Lapinski

What type of frame, and how are you mounting the photos?
Alu frame, classical matboard with window, glass, it was mounted by by some
kind of mounting specialist, I still do not know who it was, and I do not
know what did they put beneath the photo.

On Sat, 29 May 2004 07:27:33 +0200, Jerzy £apiñski
wrote:

Well, the point is that prints that hasn't mounted coming from the same
darkroom session does't not show any yellow staining. Even test prints,
which were not fixed enought and were washed 30 sec. before drying in the
microwave, do not show any stain. The print were made od Ilford FB MG
paper, two bath fixer, and hypo clearing agent were used. The washing time
was over an hour in relatively warm water - about 26 deg. C.


may3004 from Lloyd Erlick,

If all those factors are constant, then I'd guess
the mounting materials within the frame are the
next best suspects. Adhesives and paper
products...

regards,
--le

Lloyd Erlick Portraits, Toronto
voice: 416-686-0326
email:
net: www.heylloyd.com

Most window cleaners are water, ammonia, and alcohol with a little blue
color. If you are confident about your processing technique I would ask the
shop that did the mounting about the materials they used. You can always
clean the glass and then wait overnight before framing, giving the window
cleaner 12 hours to evaporate.

--
darkroommike

----------
"Jerzy £apiñski" wrote in message
...
What type of frame, and how are you mounting the photos?
Alu frame, classical matboard with window, glass, it was mounted by by
some
kind of mounting specialist, I still do not know who it was, and I do not
know what did they put beneath the photo.