[pure-silver] Re: RC to FB

Toning is more critical with FB paper, because RC is more forgiving to
processing errors. According to Ilford Technical Services, sulphide toner
also reacts with residual silver, compensating to, some degree, this
processing error. Residual silver (or fixer) in RC is rare compared to FB.
That's why there is less need for sulphide toning.

However, it is still recommended for both, and I do agree that the toning
issue is the same for RC and FB, if both have been processed 'properly'.
Unfortunately, 'properly' means different things to different people.


BTW, I thought of one more difference between RC and FB.

The issue of 'mirroring' seems to be more of a problem with RC, due to the
plastic layer below the emulsion, making a silver stabilizer like Sistan a
worthwhile last processing step. I still do it for RC and FB paper, despite
the fact that I use 2-step film-strength fixing and selenium/sulphide toning
for FB. Some consider this over-the-top, but I don't see how it can hurt.





Regards



Ralph W. Lambrecht




On 12/31/04 4:30 AM, "Ryuji Suzuki" <rs@xxxxxxxxxxxxxxx> wrote:

>> 4. Consider toning in selenium and/or brown toner a must for stability.
> 
> This is the same regardless of RC or FB.

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