In principle it's easy. I've done it plenty of times for black and white as well as color output. Best if
you make a vaccum filmholer or easel that holds your copy film truly flat; and all your other setting
should be properly leveled. If you have the habit of working clean and precise it's pretty straightforward. Your interpositive should be slightly lower contrast and full scale, so all the detail
will be on the straight line of the film curve. Just requires a litte practice. FP4 or either TMax works well for this. Then you just print it. Also helps to have a glass neg carrier and good quality enlgr
lens that is corrected for reasonably close range, that is, for the degree of magnification you anticipate. What film you choose for output can be the same as noted above, unless you need
something esp big.