Drying FB Paper

On 2/23/2005 2:47 PM spake thus:

David Nebenzahl wrote:

Just one thing--you don't re-use the blotters
too many times, do you? Seems like a big risk of
contamination otherwise (from residual chemistry
in the prints).

Of course one must be sure, or at least satisfied,
that all that can be done has been done to remove all
possible of the chemistry prior to drying.
After spongeing I pre-dry on a metal grid allowing
some of the H2O molecules to escape. While still damp
and quite flexable they are placed in the stack. The
blotters are of a non-woven hydrophobic material
which can be found at any fabric shop.

That's cool--washable, reuseable blotters. Good idea.


--
"I know I will go to hell, because I pardoned Richard Nixon."

- Former President Gerald Ford to his golf partners, as related by
the late Hunter S. Thompson

David Nebenzahl wrote:
On 2/23/2005 3:02 AM spake thus:

....
Just one thing--you don't re-use the blotters too many times, do you?
Seems like a big risk of contamination otherwise (from residual
chemistry in the prints).


If you have residual chemistry in the print, then it has not been washed
sufficiently, and the print is no good, so you might as well ditch it.

Steve

Gregory Blank wrote:
: In article ,
: Tom Phillips wrote:

: You're likely using a screen that is not chemically inert
: (as far as drying anyway.)

: How do you figure that?

: Drying screens should not leave
: impressions in the emulsion.

: No they shouldn't but it may have been a different
: screen set than the current nylon? screen I use now
: and what I am doing works so I ain't gonna fix it by
: putting the prints face down :-)

I dry my fiber prints face down on screens from Calumet (zone VI)
and when I remove the dry prints prints they have the screen pattern
on them. It looks like the screen made indentations in the soft wet
emulsion. I am of course carefull not to drag the wet print on the
screens. I've also noticed that the with time the marks fade. I've
always attributed it to the emulsion relaxing with time.

I'm sure that I'm all wet with what the screen pattern is and why it
fades with time. All I know for sure is that the screen pattern is there
when the prints first dry and after a while the screen patterns fade.

My biggest problem is when I get lint, dust, etc on the screens and I
don't notice until the prints are dry and the junk from the screen is
embedded in the emulsion of the print. I've ruined more prints then I
care to think about that way.
--




Keep working millions on welfare depend on you
-------------------

On 2/23/2005 4:00 PM Steven spake thus:

David Nebenzahl wrote:
On 2/23/2005 3:02 AM spake thus:

...
Just one thing--you don't re-use the blotters too many times, do you?
Seems like a big risk of contamination otherwise (from residual
chemistry in the prints).

If you have residual chemistry in the print, then it has not been washed
sufficiently, and the print is no good, so you might as well ditch it.

Well, of course; what I was getting at was the possibility that residual
chemistry can be absorbed by a blotter and accumulate over time, so that
eventually you have a *lot* of junk which can transfer back to prints, even if
the prints have been reasonably well washed.



--
"I know I will go to hell, because I pardoned Richard Nixon."

- Former President Gerald Ford to his golf partners, as related by
the late Hunter S. Thompson

In article . com,
wrote:

After all else has been done prior to drying, the blotter may coax some
minute additional chemistry from the print.

Yes and over time those minute amounts contaminate the prints
unless one chucks the blotter.

--
LF Website @ http://members.verizon.net/~gregoryblank

"To announce that there must be no criticism of the President,
or that we are to stand by the President, right or wrong,
is not only unpatriotic and servile, but is morally treasonable
to the American public."--Theodore Roosevelt, May 7, 1918

In article ,
Frank Pittel wrote:

Gregory Blank wrote:
: In article ,
: Tom Phillips wrote:

: You're likely using a screen that is not chemically inert
: (as far as drying anyway.)

: How do you figure that?

: Drying screens should not leave
: impressions in the emulsion.

: No they shouldn't but it may have been a different
: screen set than the current nylon? screen I use now
: and what I am doing works so I ain't gonna fix it by
: putting the prints face down :-)

I dry my fiber prints face down on screens from Calumet (zone VI)
and when I remove the dry prints prints they have the screen pattern
on them. It looks like the screen made indentations in the soft wet
emulsion. I am of course carefull not to drag the wet print on the
screens. I've also noticed that the with time the marks fade. I've
always attributed it to the emulsion relaxing with time.

I'm sure that I'm all wet with what the screen pattern is and why it
fades with time. All I know for sure is that the screen pattern is there
when the prints first dry and after a while the screen patterns fade.

My biggest problem is when I get lint, dust, etc on the screens and I
don't notice until the prints are dry and the junk from the screen is
embedded in the emulsion of the print. I've ruined more prints then I
care to think about that way.

See given enough time you always find two people that will agree :-D

--
LF Website @ http://members.verizon.net/~gregoryblank

"To announce that there must be no criticism of the President,
or that we are to stand by the President, right or wrong,
is not only unpatriotic and servile, but is morally treasonable
to the American public."--Theodore Roosevelt, May 7, 1918

Gregory Blank wrote:
: In article ,
: Frank Pittel wrote:

: Gregory Blank wrote:
: : In article ,
: : Tom Phillips wrote:
:
: : You're likely using a screen that is not chemically inert
: : (as far as drying anyway.)
:
: : How do you figure that?
:
: : Drying screens should not leave
: : impressions in the emulsion.
:
: : No they shouldn't but it may have been a different
: : screen set than the current nylon? screen I use now
: : and what I am doing works so I ain't gonna fix it by
: : putting the prints face down :-)
:
: I dry my fiber prints face down on screens from Calumet (zone VI)
: and when I remove the dry prints prints they have the screen pattern
: on them. It looks like the screen made indentations in the soft wet
: emulsion. I am of course carefull not to drag the wet print on the
: screens. I've also noticed that the with time the marks fade. I've
: always attributed it to the emulsion relaxing with time.
:
: I'm sure that I'm all wet with what the screen pattern is and why it
: fades with time. All I know for sure is that the screen pattern is there
: when the prints first dry and after a while the screen patterns fade.
:
: My biggest problem is when I get lint, dust, etc on the screens and I
: don't notice until the prints are dry and the junk from the screen is
: embedded in the emulsion of the print. I've ruined more prints then I
: care to think about that way.

: See given enough time you always find two people that will agree :-D

:-)
--




Keep working millions on welfare depend on you
-------------------

On Wed, 23 Feb 2005 13:49:50 GMT, PGG
wrote:

I simply hang the prints by clipping it at the corner with a binder clip.
Leaves a little mark, but nothing that bothers me.

Regardless, how will your customer feel if you send him a unmounted,
curled fiber print? Even if you use drying screens, blotters, etc, the
print will still curl without dry-mounting it.

I'd wondered about that but assmed that shipping it in plastic
sandwiched between stiff cardboard would not permit re-curling.

"David Nebenzahl" wrote in message
...

Well, of course; what I was getting at was the possibility that residual
chemistry can be absorbed by a blotter and accumulate over time, so that
eventually you have a *lot* of junk which can transfer back to prints,
even if the prints have been reasonably well washed.

Air dry them on vinyl screen. Press them flat between archival paper layers
in a book press. I have to believe you can find a book press.

On Wed, 23 Feb 2005 13:49:50 GMT, PGG

Regardless, how will your customer feel if you send him a unmounted,
curled fiber print? Even if you use drying screens, blotters, etc, the
print will still curl without dry-mounting it.

I don't know what kind of drying or paper you are using, but it is not truly
a problem making flat, air-dried prints. Not at all.