@FreedomEyeLove,
O2 is all ovr, the pulping process could have easily recognized that with Ti and Alkalis,(it woul just cost more so **** it you said eh?). Thats why comics are called ephemera
painting the Mona Lisa on toilet paper is a kinda dim headed comparison
2there was no pulped toilet paper during Leonrdos life
3We knew and unserstood quite well, the processes of ppainting surfaces and gessos. We did NOT know much about the life of color values and chromas
(Copper pigments had a feture of turning greenish hen azurite was used as a colorant )
When O2 is ubiquitous, the chemistry is UNDERSTOOD, so we had the technology to recognize and overcome. we just chose not to.
You identified a mechanism of oxidation (actually chlorine is a much stronger oxidizing agent and they used that in the process of pulping also.