Plural partitive article

Question

I sometimes see references to "des" as being a plural partitive article.

This relates to uncountable/mass nouns. So my query is:-

How is it possible to have a plural uncountable noun?

and then to try to express "some" of this uncountable/mass noun?

Accepted Answer

This is very difficult for anglophones to accept/appreciate or understand.

However, I believe less so for francophones for whom there are mass nouns that occur in the plural and from which "some" can be expressed.

cendres --> ashes, ténèbres --> darkness, vivres --> provisions, épinards --> spinach, pâtes --> pasta.