Looking for advice - making washi/gampi paper translucent

[ZhanTeh]

Has anyone had any luck making washi or gampi paper permanently translucent?

Looking for tips and advice from the collective knowledge here before committing to methods.

 

[koraks]

Waxing or treating with some kind of oil should do the trick. Whether it's "archival"...

 

[PGum]

If you wish to take an archival approach, consider konnyaku or even tapioca starch. Both are heated in water to boiling and then cooled, and brushed on. The paper will be a lot more brittle but will never yellow. You can even crumple and open the paper multiple times to get a very textured effect.