Fast drying Lead white and Mars black

[Eric Braks]

Hello, all.

I'm intending to go out and purchase Lead white and Mars black to produce a fast drying underpainting in the verdaccio method. These I will mix with a fast drying olive green.

My question is this: I'm aware that different paint manufacturers mix their pigments in different vehicles. Should I be wary of the vehicle used in this case, or will any version of the above pigments dry quickly?

Thanks for the help,

Regards,
Eric.