Quote Originally Posted by David A. Goldfarb View Post
And does grade 4 have the keeping properties of the softer grades?
I don't believe as well. I've used some G4 in the past and it matched G3 nearly perfect. I still have about 15 sheets of it left. I also have some G1 that is of the same age, and that seems to still be about what G1 azo would look like.