Dear customer,
You require separate targets for transparency and reflective scanning.
Larger targets allow easier handling and the larger calibration fields make the target more resistant.
The material on which the target is produced does not matter.
The only exception here are
Kodachrome targets.
Kodachrome slides have a special emulsion that react in a certain way to scanner light sources causing a blue cast.
A special target (and Scan mode) is required to compensate this.
We offer two qualities of targets.
Our normal targets are already of very high quality.
Our hand measured targets are individually controlled and offer the highest quality.
Kind regards,
Arne Ketelhohn.