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Old 14th March 2009, 03:23 PM
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agenoria2 agenoria2 is offline
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This is an Ilford formula published first in the mid 1950's it's the PQ version of ID-20, however Ilford then added Benzotriazole and it became ID-62. There were customer complaints about variations in image colour with some papers as the formula is slightly warmer working than ID-20.

This may well be the case with modernIlfospeed too.

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