Precision Digital Negatives for Silver & Other Alternative Photographic Processes is an illustrated eBook that provides a wealth of information about how to fabricate digital negatives for contact printing with gelatin silver and any alternative photographic process...
The PDN System is designed to maximize the tonality and smoothness of your final prints...
The eBook comes in PDF format (138 pages) on a cdrom that also includes the Curve Calculator software (Excel Spreadsheet) and calibration palettes required for the Precision Digital Negatives System