Comparison of negatives before (above) and after (below) standard curves.
    
Base before standard curve High before standard curve Upper before standard curve
Base after standard curve High after standard curve Upper after standard curve
 
Stack Method of Building a Digital Negative
~~~~~~~~ Excerpt from the Guide to Platinum Palladium Photographic Printmaking by Jeffrey D. Mathias ~~~~~~~~
No part of this document may be reproduced in whole or in part without the express written permission of the Author.