Acugrade FX-31 Print Developer Introduction Acugrade has been designed by Geoffrey Crawley, formulator of the Paterson Acu range, to fully exploit the contrast span and maximum densities of all modern black and white pr
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Acugrade FX-31 Print Developer Introduction Acugrade has been designed by Geoffrey Crawley, formulator of the Paterson Acu range, to fully exploit the contrast span and maximum densities of all modern black and white pr