Sorry, I mostly lurk here and didn't realise the title length limit. But if anyone interested in the history of robot uprisings in fiction hasn't read this, it's worth a look. "[P]opularized the concept of intelligent machines being virtually indistinguishable from humans and asked the audience where our humanity ends and theirs begin" actually matches it 100%.

Which of course inspired the 1920 play Rossum's Universal Robots. Wait.

It's likely to be pretty safe. The process uses Prussian blue (iron hexacyanoferrate) and titanium oxide (presumably titanium (IV) oxide, given the reference to white paint). Prussian blue is non-toxic and highly stable, despite containing cyanide groups (https://en.wikipedia.org/wiki/Prussian_blue#Adverse_effects) and is actually used as a treatment for heavy metal poisoning. Titanium (IV) oxide is so safe it's often used as a food additive, as well as already being a component of many papers - it helps make them more white and opaque. Safety issues have been raised over some sizes of titanium oxide nanoparticle (https://en.wikipedia.org/wiki/Titanium_dioxide#Health_and_safety) but despite this they're still widely used in products like sunscreen.