Foro de Filatelia Argentina

This set of stamps had been described badly from the very beginning as far as paper goes!

Mentioned in the Handbook "Polskie Znaki Pocztowe" of 1960:



As far as paper goes it just says that it has either cream, rough surfaced, thick paper or white, smooth, thick paper!

In the more recent Handbook by Kiełbasa-Schoeni/Fołta:



As to paper it mentions a type of paper with a clear sieve structure when you hold it against a light source OR just no structure to be seen at all.


Both handbooks omitted the fact that at least 2 values had been printed of paper containing woodchips. And apart from this type of paper another 3 types of wood-free paper had been used.

1st type of paper:

I found just the 20gr and 40 gr so far.




This 1st type of paper has a symmetrical sieve structure.

Second (and third) type of paper

Just as with the 1st type of paper the symmetrical sieve structure is well visible when holding the stamps against a strong light source.

But the 2nd type has irregular grooves at the front with the rhombs at the back while the 3rd type has it the other way around - rhombs at the front and grooves at the back.



At the top the grooves at the front [type 2]e, at the bottom the grooves at the back [type 3].



At the top the rhombs at the back [type 2]e, at the bottom the rhombs at the front [type 3].

The 2nd type of paper exist for all 3 values: 20gr, 40gr, 60gr and so does the 3rd type of paper: 20gr, 40gr, 60gr

The 4th type of paper:





No clearly visbile sieve structure when hold against the strong light source! Probably this is what was meant by Kiełbas-Schoeni/Fołta by uniform [jednolity]!