Almost all of method for pigment extraction & determination need HPLC at final step!DO you know any method for pigment extraction & seperation without HPLC!??
As Bruce mentioned above, paper chromatography is very simple to use and works well for many ink types (but not all). I still use paper chromatography using ordinary solvents to demonstrate chromatography in classes I teach.
Here is a link to an article I wrote on the topic which also includes a good link too. "Chromatography Basics - Coffee Filter Chromatography" ; https://hplctips.blogspot.com/2017/05/chromatography-basics-coffee-filter.html