Digital BW, The Print

The warmth of these sheets may be due to a different phenomenom other than loss of OBA. Try to let a sheet  be exposed to daylight for some hours and compare it to the others. And, surprisingly, if you let it in the darkness for a long period, it may turn yellowish again. It happened to me in a box of old Smooth Fine Art Paper 425 ( just in one box out of 10 ) and I "recovered" all the sheets from that box exposing them to a UV lamp for some hours. I have heard this can happen with Hahnemühle Photo Rag too. 

    Renato

--- Em ter, 5/1/10, frankg_photo <frankgross@gmail.com> escreveu:

De: frankg_photo <frankgross@...>
Assunto: [Digital BW] Re: ID 'ing  paper - Royal Rennaissance
Para: DigitalBlackandWhiteThePrint@yahoogroups.com
Data: Terça-feira, 5 de Janeiro de 2010, 17:15







 



  


    
      
      
      It's quite old (not sure how long I've had it but for a couple of years).

If optical brighteners don't last a print you make now may be yellowed after a few years ?



--- In DigitalBlackandWhit eThePrint@ yahoogroups. com, Tony Sleep <TonySleep@. ..> wrote:

>

> On 05/01/2010 frankg_photo wrote:

> > (must say I'm still surprised by the 'warmth' as I though Photo Rag 

> > was 'brighter'?)

> 

> It depends how old it is!. The OBA's in HPR base don't last long.

> -- 

> Regards

> 

> Tony Sleep

> http://tonysleep. co.uk

>





    
     

    
    


 



  






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