here is the link for the curl chemist on nc:
Tonya McKay | NaturallyCurly.com
she writes an article monthly and has been doing so for years, so there are lots of articles. the link takes you to the latest one, then you can just keep scrolling down for previous ones.
sometimes when i do a search on this site, i add curlchemist with the other info in the search box.
for some reason it is not always easy to access her articles, so that is why i am including the link -- gretchen gave this out in reply to my complaint about not having her articles easily accessible.
i am sure you will have more questions but this is a solid start.