How to know the paper is fixed grade or multigrade?

[ericzhu]

Just got some Kodak b&W papers in black plastic bags. Since the label is missing, I don't know whether it is fixed grade or multigrade. Appreciate suggestion of any methods to know it.

[delft]

Print a neg with filtration for grade 00 and the same neg with filtration for grade 5. See if they differ.

Greetings,
Dirk

[Roger Hicks]

Tear a sheet in half. Make test strips with a Multigrade 0 filter on one half, Multigrade 5 on the other. Develop to completion. The contrast differences between the best exposures on each test strip (which will not necessarily be the same absolute exposure, as Grade 5 is half the speed of Grade 0) will be impressive if it's variable contrast.

Incidentally, if it's Kodak it won't be Multigrade (capital letter) as this is an Ilford trademark (and an Ilford invention).

Cheers,

R.

[ericzhu]

Tear a sheet in half. Make test strips with a Multigrade 0 filter on one half, Multigrade 5 on the other. Develop to completion. The contrast differences between the best exposures on each test strip (which will not necessarily be the same absolute exposure, as Grade 5 is half the speed of Grade 0) will be impressive if it's variable contrast.

Incidentally, if it's Kodak it won't be Multigrade (capital letter) as this is an Ilford trademark (and an Ilford invention).

Cheers,

R.

Thanks, Roger. I would try it.

[sepiareverb]

And Multicontrast if it is Agfa.