Quote Originally Posted by ath View Post
There are some VC papers today which will have issues with other than red safelight.
Use the closest you can to the manufacturers recommended safelight filter. That may not be a Red filter. There can be a problem with red safelights with VC papers which causes a reduction in the achievable contrast range, it's similar to using pre or post flashing to reduce contrast.

This was the reason some manufacturers like Paterson began making special VC safelights/filters.