Proscope -

allow users to view solid surfaces—such as paper fibers, ink, or security features on currency—at magnifications up to 300x.

In educational settings, ProScope digital microscopes are frequently used alongside paper-based materials for specific scientific activities: PROSCOPE

While typically refers to a brand of handheld digital microscopes, it is often associated with "solid paper" in the context of Foldscope , an origami-based paper microscope that provides a low-cost, portable scientific tool. ProScope and Paper Integration allow users to view solid surfaces—such as paper