[alt-photo] Re: urgent gum clearing question

[Julian Smart]

Hi Loris,

Thanks for replying.

Just after I posted, I read this very article and immediately felt a bit dim 
for not having done a web search first!

I did try the Sodium Sulphite at a 5% solution and found it cleared the 
paper base in the image area to its original tone- ie off white (Fab 
Artistico 300gsm, HP). Clearing took around 15 minutes- I was a bit wary of 
leaving the print in for too long as the print edges outside the image area, 
where the pigment had built up, began to feel slightly soft and slimy. They 
would scratch, but gentle rubbing with a finger had no effect. I played safe 
and removed the prints (one to a tray) when I felt enough clearing had taken 
place.

Job done!

Cheers,
Julian.


----- Original Message ----- 
From: "Loris Medici" <mail at loris.medici.name>
To: "The alternative photographic processes mailing list" 
<alt-photo-process-list at lists.altphotolist.org>
Sent: Friday, August 19, 2011 10:09 PM
Subject: [alt-photo] Re: urgent gum clearing question


> Julian see this: http://www.apug.org/forums/archive/index.php/t-40640.html
>
> Katharine said sodium sulfite (I think she was using 5% as her regular
> metabisulfite clearing bath) would clear the print, albeit much slower
> than metabisulfite. (In 1 hour!)
>
> Hope this helps,
> Loris.
>
>
> 2011/8/19 Julian Smart <juliansmart at virginmedia.com>:
>> Hello All,
>>
>> I have found myself needing to clear dichromate stain from my gum prints 
>> for the first time. The trouble is I need to do them in the next 8 or 10 
>> hours and only have Sodium Sulphite or Sodium Carbonate available as a 
>> possible clearing agent. Can either of these be used and if so what 
>> dilution etc should I use?
>>
>> Thanks in advance,
>>
>> Julian Smart.
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