Hi all. This is fairly specific to paper as I'm working with printing from paper negatives but I think the information should be valid regardless of negative material. If have a positive (actually inter-positive), in some cases an positive enlargement from a film neg or a positive contact print from a film or paper neg), and I want to contact print an inter-negative from this positive, how do I determine the proper time and filter grade to properly render the positive information in the inter-negative so that it can properly contact printed to produce a final positive?

What gets me is that I can't quite look at a negative image and determine if it will produce the positive the way I intend so I'm looking for a workflow that will help me know how to get the inter-negative where it needs to be to properly print the final print. Thanks for the help!