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PPS tester (print-surf tester)
Paper smoothness, one of the most important printing characteristics, has since long been measured with the Parker Print-Surf (P.P.S.).
The principle is as follows: an extremely thin measurement ring is pressed over the surface of a specimen with a certain level of pressure, and air of stable low pressure is fed from the inside of the ring. The air leaks out from the surface at the extremity where the measurement ring and the paper contact each other.
– The leak air volume varies with the roughness of a paper sheet, and the amount of leaked air volume is represented as an indicator of paper surface roughness in micron meters.
– Measurement item : smoothness, compression
– Measurement range : smoothness 0.6 to 6.0 µm
– Measurement time : smoothness 4 seconds in standard (able to be set in the range of 3 to 60 second)
– Width of the measurement ring : 51 µm
– Diameter of the meassurement ring center : 31.2 mm
– Air gap width : 51 µm
– Measurement air pressure : smoothness 19.6kPa
– Clamp pressure: 490, 980, 1960kPa
– Backing : soft and hard
– Calculation item : max, min, average, SD, variance coefficient, specific compression
TAPPI T555
ISO 8791-4
JIS P-8119
2039
– The leak air volume varies with the roughness of a paper sheet, and the amount of leaked air volume is represented as an indicator of paper surface roughness in micron meters.
– Measurement item : smoothness, compression
– Measurement range : smoothness 0.6 to 6.0 µm
– Measurement time : smoothness 4 seconds in standard (able to be set in the range of 3 to 60 second)
– Width of the measurement ring : 51 µm
– Diameter of the meassurement ring center : 31.2 mm
– Air gap width : 51 µm
– Measurement air pressure : smoothness 19.6kPa
– Clamp pressure: 490, 980, 1960kPa
– Backing : soft and hard
– Calculation item : max, min, average, SD, variance coefficient, specific compression
TAPPI T555
ISO 8791-4
JIS P-8119
2039
