Automated paper opacity measurement
The precision of the Opacity Tester Model 425 provides for effective evaluation of the TAPPI opacity of paper. As one choice in the PROFILE/Plus® classic line of instruments, the Opacity Tester guarantees accurate measurement of this key paper property. The instrument operates automatically to ensure precise alignment and controlled loading of the sample and backing.
Unique self-locking device for maintaining white body adjustments.
Automatic positioning of white and black backings.
An infrared heat filter to maintain proper measurement conditions.
Meets the following industry standards:
TAPPI Test Method T425