[pure-silver] Re: Really really pink negatives

-----Original Message-----
>From: janet ness <nessj@xxxxxxx>
>Sent: Apr 19, 2009 9:16 PM
>To: pure-silver <pure-silver@xxxxxxxxxxxxx>
>Subject: [pure-silver] Really really pink negatives
>
>
>This week I had a student in my darkroom class develop her first roll of 
>Ilford HP5 120 film.  The film came out with a vivid pink base.  The negatives 
>were developed ok and seemed to be fixed - at least they had cleared.  She 
>used Kodafix for 5 minutes. The fixer had been around for awhile, but, but I 
>tested it first with a scrap of film, which cleared in a couple of minutes.  
>She also used Hypoclear, before washing the film with the Ilford method of 5, 
>10, 15, 20 and 25 inversions and water changes.  I've used these methods for 
>years and am used to a touch of pink or lavender with Tri-x, but this shade of 
>pink was about equivalent to an Ilford #3 Multigrade filter.  What's the 
>problem here?  Could it be the fixer?
>
>Janet Ness
>
     This sounds like incomplete fixing. You can test using Kodak Rapid 
Selenium Toner. Make up a little diluted 1:9 and put a drop on the clear edge 
of the film. If its not completely fixed it will turn yellow or brown in a 
minute or so. 
     If its inadequately fixed it should be refixed in _fresh_ fixer. 
     Kodafix is ammonium thiosulfate fixer, AKA rapid fixer. For film it should 
be diluted 1 part concentrate to 3 parts water and for paper  1 part 
concentrate to 7 parts water. If the fixer was used at paper strength it will 
take about 10 minutes to fix the film. 5 minutes _should_ be enough when its 
diluted to film strength. 



--
Richard Knoppow
dickburk@xxxxxxxxxxxxx
Los Angeles, CA, USA
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