| Film Footage vs Roll Diameter |
|---|
|
Length (ft) = roll O.D> (in) ² - core O.D. (in) ² / thickness (in) x 0.06545 |
|
Length (m) = roll O.D> (mm) ² - core O.D. (mm) ² / thickness ( µ m) x 0.7854 |
| Roll Weight |
|
Weight (lb) = width (in) x length (ft) x thickness (in) x density (g/cm ³ x 0.4335 |
|
Weight (lb) = width (mm) x length (m) x thickness ( ľ m) x density (g/cm ³ x 1.0 x 10 -6 |
| Area Yield |
|
In ²/lb = 27.68 / density (g/cm ³ / thickness (in) |
|
m ²/kg = 1000 / density (g/cm ³ / thickness ( µm) |
| Basis Weight |
|
lb / ream = 4.32 x 10 5 / (In 2/lb) |
|
g / m = 1000 / (m ²/kg) |
