For Primitive string, i say hemp. It was used by the Flemish in past and medieval times, was gotten from Italy then in ye olde time. Also raw silk, the green stuff, which used to be grow in France. I never understood why people went to linen, i guess hemp just had a bad rep cuz of weed ? I imagine the raw green silk is hard to get or something. Anyway, if u can get either of those , u can make a historical Flemish string if u want. Apply not wax, but natural cherry gum, though tragacanth is recommended in the guide i have as good alternative. Using natural gum, it makes the string hard and stiff but flexible yet, like a violin string a bit. I have a guide for this, but it's all in Dutch so of limited use to most here, hopefully I translated well enough for this to be of use, for people wanting to make Traditional string like the old Flemish used to, much good string rolling to y'all!