[alt-photo] Sizing Gamblin PVA and hardening?

[Jacek Gonsalves]

Hi guys,

Gelatin coating with sizing and using Formalin as a hardner I am  
seriously opting out of it. The formalin really is affecting me even  
with a mask and doing the work outside.
I haven't gone the route of Gelatin and Glyoxal, unless that isn't as  
potent as Formalin?

So sizing with Gamblin PVA, will it still need a hardner?
Cheers
Jacek