Lot of Old vintage Sand Paper. Carborundum silicone carbide, Napa. 220, 280

Description

Lot of Old vintage Sand Paper. Carborundum silicone carbide, Napa. 220, 280
all are from the late 70's.
Manufactured at Union carbide or carborundom in Niagara Falls N.Y. or Buffalo N.Y.
My Dad worked at both places. Both made sand paper, So I'm not sure which they came from.
The Napa sheets were with the others. I'm not sure if they were made at the same place.
One box of black paper has 61 sheets. Some marked Carborundum and some marked Napa.
all waterproof. some are more coarse than others.
One box of black paper has 32 sheets. all marked
Carborundum silicone carbide fast cut finishing paper 220 A115F
There are 28 sheets of brown paper marked
Carborundum Garnet 280 A115F
I didn't count the extra black sheets not in a box.
there are approximately 20 sheets.
There is a total of approximately 140 sheets total.
some have damage as you can see in the photos but most of the sheet can still be used.
These are all old nad have been stored in a basement.
They are dusty and messy.