Is Minkus acetate interleaving safe?

Hi! Digging around in my junk boxes, I have turned up about 100 Minkus acetate interleaving sheets. The price on the pack is $3.50 so I guess they
come from the mid-1980s. Are they safe to use or are they full of plasticizers and other nastiews?

Cheers - John Mycroft

Hi John,

Helping a friend of mine in breaking down collections I have come
across acetate interleaving in some older collections. I do not know
if they were Minkus or not. The sheets should be alright seeing that
they are from Minkus. But back in the 'dark ages' no one really knew
much about plasticizers and such and I probably would not use them for
long term.
Just one opinion.

Jerry B