17
CHAPTER 1
– How to use TECHKON SpectroDens
Menu: Measurement conditions
When the “soft key” in the right section of the lower bar is activated, a window opens
where you can set the measurement conditions which define the parameters of the
measurement, e. g. which filter will be applied.
The measurement conditions 4. – 18. are described in detail together with the corre-
sponding measurement functions in chapter 2.
1. The device has an integrated
Polarizing fil-
ter
, which can be activated or deactivated by
a push of a button. Polarizing filters compen-
sate for measurement differences between
glossy and non-glossy surfaces (e. g. freshly
printed and dried sheets). The technical stan-
dards in Europe recommend the use of such a
filter for densitometric measurements. On the
other hand, colorimetric measurements (e. g.
L*a*b*-measurements) should be taken with-
out a polarizing filter.
By selecting
Auto
from the menu, this will be
taken into account and there will be automat-
ically the right filter setting.
2. There are two possibilities for defining the
White Reference
: Density measurements
usually are referred to the white value of the
paper printed on. Colorimetric measurements
refer to an absolute white reference which is
supplied as a ceramic tile on the charging
console.
By selecting
Auto
from the menu, there will
always be the right setting according to the
measurement mode which is selected.
3. Depending on the regional technical stan-
dards different
Density Filter
settings are
required. SpectroDens as a powerful spectro-
photometer has the great advantage that any
filter specification can be exactly calculated
out of the spectral data. There is no limitation
known from conventional filter based densi-
tometers with fixed filters built in.
In Europe filter ISO E is to be selected as the
standard filter.
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