Coffee beans grade I screen 16:

On sieve screen 16 90% min

Moisture 12.5% max

Foreign matter 0.5% max

Black & Broken 2% max

Foreign beans 0.1%

Coffee beans grade I screen 18:

On sieve screen 18 90% min

Moisture 12.5% max

Foreign matter 0.5% max

Black & Broken 2% max

Foreign beans 0.1%

Coffee beans grade I screen 16 wet polished:  

On sieve screen 16 90% min

Moisture 12.5% max

Foreign matter 0.2% max

Black & Broken: 1% max

Coffee beans grade I screen 18 wet polished

On sieve screen 18 90% min

Moisture 12.5% max

Foreign matter 0.2% max

Black & Broken: 1% max