[alt-photo] Re: Weston Diploma Parchment

[Mark Nelson]

Try Heico Permawash for clearing Pt/Pd. Mix 1 oz per qt of water. Use  
3 5 min baths.

Mark Nelson
www.PrecisionDigitalNegatives.com
PDNPRint Forum @ Yahoo Groups
www.MarkINelsonPhoto.com

sent from my iPhonetypeDeviceThingy

On Mar 8, 2010, at 8:26 AM, Diana Bloomfield  
<dhbloomfield at bellsouth.net> wrote:

> Jon,
>
> Have you printed any of these without using a hair dryer  
> beforehand?  I'm thinking your problem might be either exhausted  
> ferric oxalate,  and/or use of the hair dryer-- as well as allowing  
> it to sit for an additional 15 minutes after using the hair dryer 
> (?).  I taught a workshop once where there was some evidence of  
> fogging, but only for those people using hair dryers-- even when  
> they set it on a "cool" setting.  When we eliminated the use of hair  
> dryers, the problem disappeared.   Just a suggestion, but it's worth  
> a try to switch to fresh ferric oxalate and skip the hair dryer.  I  
> also think certain papers are really a disaster for pt/pd.  I used  
> to use, many years, ago Cranes Platinotype (sp?), and I couldn't  
> completely clear a print on that paper to save my life-- no matter  
> what I used..  I never liked the Weston paper, either, but I know  
> I'm in the minority there.  I just don't like the weight of it.
>
> Diana
>
>
> On Mar 8, 2010, at 5:25 AM, Jon Reid wrote:
>
>> Hi all,
>>
>> I have been battling a problem for about 6 months now. At first I  
>> thought it was a clearing problem then after trying various things  
>> realised that it wasn't clearing but rather some density that was  
>> appearing in the coated area of the paper that is masked during  
>> exposure. The paper that I have been trying to print on is Weston  
>> Diploma Parchment. I bought this paper in early 2008 from Bostick &  
>> Sullivan and believe it is stock that was made by Cranes, not the  
>> re-invented Diploma Parchment Plat Pal being marketed by John  
>> Zowkowski of Butler Dearden.
>>
>> I am wishing to print my 5x7 rollo-pyro negs on these 11x14 sheets  
>> for my debut solo exhibition. I do not want to mat the prints so I  
>> am trying for very clear coated-but-masked areas. The other night,  
>> believing I was dealing with a fogging issue I set up darkroom  
>> safelights and coated under those lights. I then used a hair dryer   
>> and rested the paper in the room for 10-15min before exposure  
>> (11min in my UV box), and developed in KOx (cold bath version- 
>> fresh) at 21C.
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