Packages of paper list which filter settings to use for each grade. They are usually divided into several types of color heads and filters. For example from ILford Multigrade Papers: Durst (Max 170M), Durst (Max 130M), Kodak, Meopta
where
Durst includes Durst, Dunco, Kaisar, Kienzle, Leitz and Lupa
Kodak includes Kodak, Advena, Beseler, Chromega, De Vere, Fujimoto, IFF, Jobl, LPL, Omega, Paterson, Simmard, Vivtar
Meopta includes Meopta