Technical data

Appendices
............................
C 2
3 „Zeroing“ the GretagMacbeth Reflection Densitometer
The unit must be “zeroed“ for all measurements based on paper white and for all relative
measurements (dot area, dot gain trapping, contrast) with absolute white as white base before
starting a measurement series on a new paper.
Zeroing must be performed at least once daily or if the ambient temperature changes more
than 10°C.