Personally I have long been a proponent of vellum paper & laser printer for any and all paper wallet functions. This combination is not an ink printing process susceptible to degradation at the same rate of an inkjet on semi gloss which is what many makers used for paper source early on for some reason I cannot understand.

Vellum + laser. Vellum paper is water proof & tear resistant. I can't tear a sheet with bare hands. It also has a semi porous surface. A toner based laser printer prints by melting plastic particulate onto the print medium. This combination should make for long lasting adherence without the risk of ink fade. Directly out of the printer, I cannot even smudge or scratch the ink with a coin. I have left privkeys printed like this in a glass of water for over a week resulting in zero state change. I did not test further as I felt this was adequate for personal use.

I am not in support of printing on any gloss or semi gloss paper surfaces including waterproof variants as adhesion to a gloss surface is inherently more difficult to achieve.

Just my .02