IGT Testing Systems, P.O.Box 12688, 1100 AR Amsterdam, The Netherlands
Keienbergweg 25, 1101 EX Amsterdam, The Netherlands
Phone +31 (0)20 409 9300, Fax +31 (0)20 697 4842, E-mail:
Internet: www.igt.nl
W46 for IGT AIC2-5T2000
17.
Examine or measure the results as pointed out in the chapter
“Assessment”.
18.
If desired, repeat the points 1 thru 17 for other interval
times.
19.
Repeat the points 1 thru 18 for the other types of paper or
ink.
20.
After having finished the tests, clean and store all parts as
described in the manuals.
21.
Make an
accurate
record of
the
conditions
and the
results of
the test.
Assessment
See figure 2.
1.
Visually
Judge the
differences
between the
prints for
different
interval
times of
both colour
sequences.
The colour
sequence
with the smallest difference between the prints of different
interval times is the best colour sequence.
2.
Densitometrically
2.1.
After > 4 hours after making the print measure the contrast
density of all parts (both single colours and both colours) of
the strips with
the
densitometer
set for the 2
nd
colour.
2.2.
Calculate the average of the measured densities per part.
2.3.
Calculate the % of ink transfer with the formula:
D
(1+2)
– D
1
F = ------------------ x 100 %
D
2
In which: D
(1+2)
= density of both colours together
D
1
= density of 1
st
colour, D
2
= density of 2
nd
colour
2.4.
The highest % of ink transfer is the best colour sequence.
Notes
:
1.
The test results of the AIC205T2000, AIC2-5 and Global
Standard Testers 2 compare well with another on the
condition that the tests have been carried out under the same
testing conditions.
2.
It is advised to use the following settings for the High Speed
Inking Unit 4:
Water bath
: 23.0º C (73.4º F)
Mode
: 2
Starting time
: 5 s
Distribution time
: 10 s
Distribution speed
: 1.2 m/s
Inking time printing discs : 5 s
3.
To reach an ink film thickness of 2.4 µm on the High Speed
Inking Unit 4 with a 4-segmented toproller a quantity of
0.10 cm³ has to be applied. It is not advised to add some ink
after a test.
4.
In most of the cases the extra interval times of 3 and/or 6 s
will be used. The time of 0.1 s will present as a result of the
speed 1.0 m/s.
This information leaflet has been compiled with the utmost care.
However, may you find any inadequacies or if there are any comments,
we kindly request you to send these to IGT Testing Systems, Sales
Department.
Fig. 2 Wet-on-wet printing
Beginning of print
2
nd
colour
B
A
1
st
and 2
nd
colour
with interval time
0.07 s for 1 m/s
A + B
0.07 s
B + A
0.07 s
1
st
and 2
nd
colour
with interval time
i s
A + B
i s
B + A
i s
1
st
colour
A
B