RE: What is Paper Brightness (was RE: defining media white)
RE: What is Paper Brightness (was RE: defining media white)
- Subject: RE: What is Paper Brightness (was RE: defining media white)
- From: "michael shaffer" <email@hidden>
- Date: Tue, 2 Oct 2001 15:31:29 -0230
Scott writes ...
>
Brightness for pulp and paper is measured in ISO brightness ("ISO
>
Brightness" is the amount of light reflected from the surface ...
>
>
I believe the light source is at a 45 degree angle to the stock, while the
>
measuring instrument is at a 90 degree position (relative to the surface).
>
...
Thanx for the enlightenment (no pun intended <g>) ... the only question
remaining is what reflectance is considered possible? That is, at 45deg, it
wouldn't seem numbers near 100% are physically possible(?)
shAf :o)