These multiples are a representative sample of the 1L papers for the more common large format values.
30c; The white paper specimens seem to be printed on a paper that is similar in porosity to the bright white Straight Rays (2C) paper
40c; The 40c also seems to have been printed on the porous 1L paper I have yet to catalog.
2p; This stamp was printed during the 1950s on at least one paper that seems to be unique to this value.
This stamp was also commonly printed on the dark 'Zarate' 1L5 for which the watermark is barely visible.