Have you seen this info on Rusk Anti Curl:

All About Rusk AntiCurl

I have had anti curl many times over the yrs. I loved how it made my hair easier to manage, loosened the curl, less bulky hair and less frizz even in humidity and I think it made it softer. I haven't had one since almost 6 yrs but am going to be looking into get another soon.

In that article it says they leave it on 20 mins for normal hair I guess that means unprocessed and 15 for processed.
3a/b medium/coarse combo(w/some fine strands), normal porosity, normal elasticity(strong)
Komaza analysis 2015: medium to coarse combo(some fine strands), normal porosity, strong elasticity, healthy hair
Goosefootprints 2013: moderately coarse with some medium; low porosity at roots, normal thru shaft, porous ends, normal elasticity