Fibre Rising Tester
Measures the tendency of fibres to break free from the surface of the paper in the presence of water. Particularly useful in assessing paper and board's suitability for offset printing. The resultant free fibres that can break away from the paper's surface may cause linting or loss of surface gloss.
Used in assessing the printability of paper and board. Measures the tendency of fibres to break free from the surface of the paper in the presence of water.
Measures the tendency of fibres to break free from the surface of the paper in the presence of water. Particularly useful in assessing paper and board”s suitability for offset printing. The resultant free fibres that can break away from the paper”s surface may cause linting or loss of surface gloss.
A paper strip is treated with a pre-selected volume of liquid, i.e. water or fountain solution. The liquid is applied to an area along the centre of the strip. As the contact time between the liquid being applied and the paper is constant, the amount absorbed will depend upon the paper”s natural sorptive properties.
After the liquid has been applied, the paper is rapidly dried with an IR-heater to a preselected surface temperature. The stress cycle of moisture and heat can be repeated several times to simulate multi-colour offset printing.
In the inspection section a video camera detects the structural changes induced by the combined moisture and drying treatment on the paper surface. The long and short fibres extending above the paper surface correlate to linting and gloss reduction found after printing.
Features
- Measures fibres rising, fibre roughness, number of lifted fibres and fibre length indicative of linting, gloss reduction (roughening) or tissue softness
- Optical non-contact evaluation of the paper surface
- Simulates the surface stress from moisture and heat of the offset litho process
- Shows absorption at a constant contact time of one millisecond
- Full test cycle of hundred images in 60 seconds
- Detects two-sidedness
- Windows ® based software provides user friendly test set-up, analysing and reporting
Technical date
- Moisturising unit
- Volume applied
- 0 – 9.9 grams/m2
- Contact time
- 1 millisecond
- Heating unit
- Surface temperature
- Ambient – 199 °C
- Drying time (110 °C)
- 3 seconds
- Inspection unit
- Field of view
- 4 mm wide
- Image resolution
- 0.008 mm
- Test time (100 images)
- < 60 seconds
Physical specifications
- Dimensions – 110 x 28 x 30 cm (W x D x H)
- Net weight – 16 kg
- Connections – Electricity: 230V / 1 Ph / 50 Hz