Hello -- I assume you are asking about paper for 110 mm standard
"Raffin" or "Carl Frei", etc., music rolls.  I (or rather Rudolf
Klomfar, who punches for me) use standard white paper with weight
about 80 grams per square meter.

Technically, this has the well-known disadvantages of tearing, and
expanding and shrinking with changing humidity.  But practically,
this has not been a problem for my 20-note rolls.

I played two weeks ago in Waldkirch, where we had very humid weather
for the previous two weeks, and now the weather is very dry.  The same
rolls were also stored and played in winter in my heated house (which
was then probably much drier), but I have not seen or heard any problems.
At least, with the 20 notes stretching over a width of about 8 cm,
the shrinkage problem can, in my opinion, be ignored.  Regarding the
tearing problem -- well, if you have your own puncher, you just
punch out another one ;-)

The other advantage of standard paper is, of course, the price.  I have
heard that Edi Hofmann punched on Mylar (which apparently wears the
punches about 10 times as fast as standard paper) but that he
discontinued this practice (because of the price??).

Regards
Harald M. Mueller
Grafing b. Muenchen
Germany