My printer won't take anything but regular paper either, so that's what I use.
I usually use an 80/12, but if all I had was a 90/14, I'd be using that.
If you are nearby a copy shop, you may find it cheaper to have them print your patterns if you are printing a whole bunch as printer cartridges cost so much and copy shops around here charge very little per copy for just regular b&w copies.
Have fun and let's see you practice blocks!
Watson