This knife is somewhat expensive, but I think it would make a great tool for cutting fine detail and thin papers.
Clear-cornea Trapezoid diamond knife, angled, 2.50mm/2.80mm wide tapered blade, sharp sides, j-slot titanium handle | Ambler Surgical
This one is more affordable because it is made out of Chinesium;
Clear-cornea sapphire trapezoid knife, angled, 1.80mm/2.40mm wide tapered blade, sharp sides, j-slot titanium handle | Ambler Surgical
This knife cuts at the molecular level, and would cause minimal trauma to the paper:
Side-Port Diamond Knife, 20deg Trifacet Blade (Straight) 6-10/6-0531 - accuspire
Anyone willing to do a product review?