EDIT: I did the titration. I used 500ml of my stock solution HCl, and titrated versus my stock solution of NaOH. HCl is 0.001M and NaOH is 5M. Scrape the copyright onto a flat surface area. The best point is to implement blank items (not inked, like printer paper ) https://psychedelicstrippyworld.shop/product/buy-copyright-online/