[alt-photo] Re: PVA addn. to pt/pd soln.

[BOB KISS]

DEAR LORIS & DIANA,
	Many years ago when I started pt/pd printing I wasn't getting the
D-max I hoped for using on the Lenox paper I was using at that time.
Someone on the list suggested a drop or two of PVA in the coating solution
and it worked wonders:  Good D-max and no bleeding.
	Well, as J. R. R. Tolkien said, "Old Hobbits die hard!" so I
continued using it when I switched to Cranes Platinotype again getting
excellent results:  Good D-max and no bleeding.  I simply continued since I
have been mostly using COT 320 for the last 5 years.  Excellent D-max and no
bleeding before this last week.  This strongly indicates that something has
changed just recently.  
	I have changed the following and the bleeding is gone:
1) I made certain that the paper was completely dry before re-humidifying.
I had gotten a little lazy about this.  
2) I more carefully controlled my Dev temp (I let it get a little too warm
on the print that bled).  
3) I reduced the PVA by one drop per 11X14 coating volume.  
	As my 3 year old daughter says, "Awww gone!"  No more bleeding.  
	Do I need the PVA with COT 320?  Perhaps not but it isn't "broken"
so I am not going to "fix it".  The bleeding could just as easily been from
not fully drying the paper as from anything else.  
		HOLIDAY CHEERS!
			BOB
	

-----Original Message-----
From: alt-photo-process-list-bounces at lists.altphotolist.org
[mailto:alt-photo-process-list-bounces at lists.altphotolist.org] On Behalf Of
Diana Bloomfield
Sent: Wednesday, December 16, 2009 10:02 AM
To: alt-photo-process-list at lists.altphotolist.org
Subject: [alt-photo] Re: PVA addn. to pt/pd soln.

I was wondering the exact same thing.  I'm really curious.  I've never  
heard of using PVA to coat pt/pd-- and especially, as Loris says, on a  
paper like COT320.   I would think that alone might be the source of  
any coating/bleeding problem.  ??

Diana

On Dec 16, 2009, at 7:43 AM, Loris Medici wrote:

> What is the purpose of adding PVA into pt/pd solution - especially  
> for a
> hard paper like COT320?
>
> Regards,
> Loris.
>
> -----Original Message-----
> From: alt-photo-process-list-bounces at lists.altphotolist.org On  
> Behalf Of BOB
> KISS
> Sent: Wednesday, December 16, 2009 2:24 PM
> To: alt-photo-process-list at lists.altphotolist.org
> Subject: [alt-photo] Re: BLEEDIN' PT/PD PRINTS
>
> ...
> I use 2 drops of PVA in enough soln to coat an 11X14 sheet of COT  
> 320.  Good
> or bad?
> ...
>
> -----Original Message-----
> From: alt-photo-process-list-bounces at lists.altphotolist.org On  
> Behalf Of
> Christina Anderson
> Sent: Tuesday, December 15, 2009 10:49 AM
> To: alt-photo-process-list at lists.altphotolist.org
> Subject: [alt-photo] Re: BLEEDIN' PT/PD PRINTS
>
> Bob,
> How much PVA are you adding to the coating solution?
> ...
>
> _______________________________________________
> Alt-photo-process-list | http://altphotolist.org/listinfo

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