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COMPARISON OF TWO TYPES OF DEEP CLEANING: ULTRASONIC CLEANING AND LASERECOCLEAN
Bellow you can see the cleaning results of the anilox rolls with line screen 360 lpi and a volume of 4.2 vol.
The roll was cleaned regularly during the entire lifetime.

Comparison was made in the following way: Firstly, the roll was cleaned with ultrasonic cleaner. Than the half of the roll was cleaned with laser. Optical density was measured with a densitometer and by weighting.

On the printing unit was pulled the solid color and 6-7 measurements in the whole printed field were made under same printing conditions.
It was used ink cyan with 23 seconds ink viscosity. Printing speed 220m/min. Printing substrate: metalalic BOPP 15 micron.
Evaluation method
Ultrasonic cleaning
Laser cleaning after ultrasonic cleaning
Difference
Ink transmission increase
0,2 g/m2
0,4 g/m2
+ 0,2 g/m2
Optical density
2,58
2,68
+ 0,10
Also the cleaning on the roll from another printing unit was made. The ink Pantone 072 with 23 seconds viscozity was used. Printing speed 220m/min. Printing substrate: metallic BOPP 15 micron. On the printing unit was pulled the solid plate and 6-7 measurements in the whole printed field were made.
Evaluation method
Ultrasonic cleaning
Laser cleaning after ultrasonic cleaning
Difference
Measurements of the cells volume with Troika AniCam
6,3 cm3/m2
7,0 cm3/m2
+ 0,7 cm3/m2
Optical density increase
0,17
0,33
+ 0,16
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