Making contact negatives
other techniques

Unless you own a negative having the same size of the image you want to get, you need an enlarged negative to make old process prints. I have never tried the conventional way, that is by making use of sheet films and an enlarger, so I can only tell you that a computer is a convenient method to produce contact negatives. The basic steps are: scanning the negative, using an image manipulating software to create a digital negative of the desired size, and printing out the image onto a trasparency film.

Here are some links on how to make digital negatives:

www.alternativephotography.com - An easy way to get digital negatives by Jim Read

Bostick & Sullivan - Two technical papers in the section "Digital Negative Making"

Dan Burkholder - The author of the book "Making Digital Negatives for Contact Printing"