Aluminium foil for packing silver articles

I wants to know whether it is safe to pack and store silver articles
like jewellery, cutlery and hollow-ware in aluminum foil, many
times our customer says that their ancestral silverware never
tarnishes even though they are kept open in cupboards, I wants to
know what is the reason for this?

I have noticed some silverware which were regularly used and kept
aside for some years didn’t tarnish, on the other hand some old
decorative pieces tarnishes.

Pankaj Bakhai