posted January 26, 2004 08:21 AM               

On-line with a long time constant?

Off line with a capacitance gauge?

Pounds/ream?

Measured by hand with a snap gauge, at 1" increments?

2-sigma or 3-sigma?

What is your nominal thickness?

Are you measuring MD variation, TD variation, or both?

All of these things matter, and the relationship between different measurement methods is approximate at best.

Of course it also depends on the product you are running- a high quality product will generally be run slower, to reduce thickness variation. Trash bags, on the other hand, rate is more imporatant and thickness variation is secondary (but still a factor).