| http://www.w3.org/ns/prov#value | - If present, it can be provided as sodium thiocyanate, potassium thiocyanate, or ammonium thiocyanate, or mixtures thereof.A particularly useful photographic fixing composition has a pH of from about 2 to about 9 and comprises ammonium thiosulfate as the fixing agent, sulfite ions, and a buffer such as a phthalic acid or a salt thereof as described above.Stabilizing or rinsing compositions can incl
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