Earlier quoted context omitted.
eh... 6 months is really stretching it! Once it has been cut from the wheel, the usable life will be a few weeks maybe a couple months max if properly stored. While it may not mold, it will desiccate and become hard and waxy. You might not be able to tell if you're just grating it finely, but if you're cutting off slivers it will taste different when it's been sitting for too long in the fridge. Local Italian and gou…
real parmigiano doesn't have preservatives so it'll mold in a month after opening; grana padano usually does have and will last longer; both will become dry in time after opening. in genera both tastes ok even when they dry out, albeit they gets saltier; if one eats cheese slowly, I'd suggest to get one relatively younger (i.e. 9 months) so as the flavor matures it doesn't get overly strong. they both contain a lot o…
Salt is a preservative.