>>10797400acid free is for paints, inks, and paper. If you paint models, that's best way to do long term storage. It's for inherently delicate stuff, which consumer grade paints are.
The paint you find on mass manufactured toys is super durable. That paint should last for decades, if not a century. It's super toxic banned-in-1st-world countries industrial strength paint.
Only reason it wouldn't last as long is IF it was flawed from the day it was conceptualized. Shit needs antioxidants, stabilizers and other shit to be long lasting, and they need to take into account other pigments/chems/etc, for when the plastics and paints are being put together.
In general, you only want to use paper products for your toys when plasticizers are leaking, as a plastic bag will trap in the off gasing and the plasticizers will all be concentrated in going back onto the figure itself. These plasticizers can cause other areas of the figure (and other figures too) to start decomposing faster, so it's why you generally want to seperate a weeping figure from the rest of your collection and also give it space for the plasticizers to evaporate. Paper can also act as a barrier and minimize liquid plasticizers from touching other figures, if it's kept in storage with other figures.
In short, don't waste your money on cardboard boxes and special paper. That's only important 30-80 years later.
Right now, the best thing you can do is just keep your figures away from strong light. If you want to be more anal, invest in air conditioning and store your toys in air tight containers.
