Bull/heifer
Thickens bull hides: 3,5-5,5mm. Average area: 4,4-4,7 square meter.
Thickens heifer hides: 3-3,5mm. Average area: 4,3 square meter.
Cow
Thickens cow hides: 3-4mm. Average area: 4,4-4,8 square meter, depends of method of tanning (for shoes or for upholstery)

chromium content 7%, PH value 3,9-3,8