Some examples you have shared speecially, the Kassa curve, can you please share if this is from a book? or where I can such details for other letters?
I never am able to read articles till the end, they usually either go out of context or plain…
Mustafa Pracha
51

I’m so glad you find the article useful :)

There is a very good booklet that mention the details of letters in Thuluth. You can download it from here (it is in Arabic) http://arfontscalligrapher.blogspot.com/2018/06/blog-post_23.html?m=1

Hope this help. And please let me know if that is not what you were looking for