ALTANA Haze-Gloss Manual - Manual (Page 20)

AUTO-RANGE
60° 20.7
85° 47.2
• If highly reflective surfaces are
measured using the 60
° geometry
and the measured value exceeds 70
units, the measurement should be
repeated using the 20
° geometry.
• Matt surfaces showing measured
values of less than 10 units (using the
60
° geometry), should be measured
using the 85
° geometry.
In order to obtain a better differentiation
of the measured values, we recom-
mend the 85
° geometry in all cases in
which the value measured at 60
° is
below 30 units. Application recommen-
dations differ in the various standards.
While the ASTM D 523 standard sets
the upper limit for changing from 60
° to
85 ° geometry at the value of 10 gloss
untis, ISO 2813 sets this limit at 30
units. These limits should be regarded
as recommendations.
Mirror Reflection Measurements
The haze-gloss offers an extended
measuring range, which allows for the
measurement of samples with great
reflecting power (polished metal
surfaces, mirrors). In this mode the
gloss values range up to:
2000 gloss units at 20 °
1000 gloss untis at 60 °
160 gloss units at 85 °
(calibration performed at the manufac-
turer).
As mirror gloss measurements are
often related to customers' standards,
haze-gloss offers the possibility to
calibrate against customer-specified
standards (see Chapter 5, Calibration).
Note
• In the auto-range mode the 60/85 °
dual angle geometry is used for
reflectometer values below 30; the
60
° single angle geometry is used for
reflectometer values between 30 and
70, and the 20
°/60° dual angle geo-
metry is used for reflectometer values
exceeding 70. (Reflectometer values
always relate to 60
°)
• It is not useful to take measurements
on samples showing contaminations,
scratches or other damages, unless
you want to evaluate the degree of
such defects by means of gloss
measurement.
AUTO-RANGE
60° 20.7
85° 47.2
• If highly reflective surfaces are
measured using the 60
° geometry
and the measured value exceeds 70
units, the measurement should be
repeated using the 20
° geometry.
• Matt surfaces showing measured
values of less than 10 units (using the
60
° geometry), should be measured
using the 85
° geometry.
In order to obtain a better differentiation
of the measured values, we recom-
mend the 85
° geometry in all cases in
which the value measured at 60
° is
below 30 units. Application recommen-
dations differ in the various standards.
While the ASTM D 523 standard sets
the upper limit for changing from 60
° to
85
° geometry at the value of 10 gloss
untis, ISO 2813 sets this limit at 30
units. These limits should be regarded
as recommendations.
Mirror Reflection Measurements
The haze-gloss offers an extended
measuring range, which allows for the
measurement of samples with great
reflecting power (polished metal
surfaces, mirrors). In this mode the
gloss values range up to:
2000 gloss units at 20
°
1000 gloss untis at 60 °
160 gloss units at 85 °
(calibration performed at the manufac-
turer).
As mirror gloss measurements are
often related to customers' standards,
haze-gloss offers the possibility to
calibrate against customer-specified
standards (see Chapter 5, Calibration).
Note
• In the auto-range mode the 60/85
°
dual angle geometry is used for
reflectometer values below 30; the
60
° single angle geometry is used for
reflectometer values between 30 and
70, and the 20
°/60° dual angle geo-
metry is used for reflectometer values
exceeding 70. (Reflectometer values
always relate to 60
°)
• It is not useful to take measurements
on samples showing contaminations,
scratches or other damages, unless
you want to evaluate the degree of
such defects by means of gloss
measurement.