It does not take long to find your own groove when it comes to contact printing on AZO. More or less density, more or less contrast, try them all with AZO is what I have done. I even switch bulbs (I use a 60w and a 200w) mid printing just to see differences if any. Rather than denisty or contrast I look for detail instead. If there is plenty of it then it will work! Check the negative on a lightbox and see if it has all the information that translates how you felt when the photograph was taken. If I like the negative then I will like it on AZO.