Methods - Innventia

Methods

Image analysis - Methods

Sheet structure

• STFI Formation – local grammage distribution using beta radiography

• Innventia Grammage Map Inspector
• Optical formation – The visual impression of the formation
• Local fibre orientation in sheet layers
• STFI Local thickness – imaging thickness variation in a sheet
• Coating layer variations (using burnout technique)
• Local density variations (a combination of local thickness and local grammage)
• Local Contact and Stress Analyzer - Pressure distributions of paper under different load
• Cross-sectional structure of paper

Sheet surface

• STFI OptiTopo – a unique method to correlate surface topography and print defects

• The STFI OptiTopo device - Purchase yours now

• FRT MicroProf – Uses chromatic aberration to calculate the height variations?
• Cockling – large scale height variations in newsprint
• Paper surface topography and compressibility by confocal microscopy
• Microroughness by CLSM and AFM in µm and nm respectively
• MicroDAT – Droplet sorption measurements on various surfaces

Print quality

• STFI-Mottling – an accurate way of quantifying print density variations (full tone and half tone)
• White-top Mottling – reflectance variations on unprinted board
• STFI-BackTrap Test – water induced mottling in offset printing
• STFI-Mottling Expert – purchasable software
• MicroGloss by Innventia – a way of measuring gloss quality as we perceive it
• Flexible angle gloss variation (possible to measure in different angles, sample size up to A3)
• Inkjet test (sharpness, bleeding, gamut)

• Missing dots - Measure, understand, predict and avoid
• Missing dots by CLSM

• Print sharpness

Runability

• Determine the Linting tendency (STFI LintPick Test)

Fibre characterisation

• Size of cellulose fibril aggregates in S2 fibre wall by AFM
• Fibre and lumen dimensions of cross-sections
• Characterizing of fibre surfaces by light, confocal, electron and atomic force microscopy
• Fibrillation grade of fibres
• Microfibril angle angle by confocal microscopy

INNVENTIA AB | Phone +46-8-676 70 00 | Fax +46-8-411 55 18 | Drottning Kristinas väg 61, Stockholm | |