I tested some UK fountain pen papers, like Soporset Offset 60gsm, against Tomoe River 58gsm. The goal was to find a more affordable, easy-to-get option. I used Diamine Sargasso Sea, Eclipse, and Registrar's Ink for the test. The Results? There was no bleedthrough, but some showthrough with the thinner papers. I wonder if these UK alternatives can hang with Tomoe River