Is the Crane's 90# Cover paper at photographer's formulary the same as Crane's Platinotype?
No it's not the same paper as far as I know. The #90 Cover Natural White can be used for platinum printing though. I've used a lot of it in the past and it's a decent inexpensive paper. You can order the paper directly from Crane's BTW in parent sized sheets or in boxes of precut 8.5x11 sheets which is very convienient. Ordering from Cranes Direct is a money saver. Don't order any Cover that is heavier than 90# such as the 110. It will bubble and delaminate when wet. The 90 works okay for sizes of 11x14 and smaller but larger than that size the paper has wet strength problems and tends to tear unless handled very carefully.
hi dr.phil - i just used some crane 90 from photographer formulary for cyanotypes and agree with don, the paper doesn't like to be handled much. i was using a blow dryer, low setting, with an 11x14 sheet and tore the corner i had clamped to my drying line. i also noticed that i was rubbing off the paper fibers where my hand was holding the paper. the other two prints i air dried only after washing look great.