I had a conversation with Paul from RH Designs (aka secondhand darkroom supplies)
I was discussing user exposure (not contrast) calibration technique.
He assured me that once you have the test strip results and have derived a number from the offset chart,
plus any exposure compensation, the number entered into your chosen PA P (1) channel is the latter number less the number that is already in that channel i.e. the factory setting which is for Ilford MG 1V
Looking at the video on customer calibration, Chris Woodhouse explicitly states that your own calibration number should be deducted from the setting/number already present in the Analyser – in my case I used the Ilford MG V as my starting point as advised by the RH website not the Ilford MG IV
This makes sense to me as the paper strip calibrations are derived using these exposure and contrast settings.
Any advise on this would be most useful.
Thank you.
I was discussing user exposure (not contrast) calibration technique.
He assured me that once you have the test strip results and have derived a number from the offset chart,
plus any exposure compensation, the number entered into your chosen PA P (1) channel is the latter number less the number that is already in that channel i.e. the factory setting which is for Ilford MG 1V
Looking at the video on customer calibration, Chris Woodhouse explicitly states that your own calibration number should be deducted from the setting/number already present in the Analyser – in my case I used the Ilford MG V as my starting point as advised by the RH website not the Ilford MG IV
This makes sense to me as the paper strip calibrations are derived using these exposure and contrast settings.
Any advise on this would be most useful.
Thank you.