Colour and Gloss Measurement for Pulp and Paper

Measurement data helps pulp and paper manufacturers improve process stability, reduce waste and provide evidence that products meet customer specifications. Instead of relying only on visual assessment, teams can measure optical properties against defined standards, tolerances and production targets.

For pulp mills, measurement data supports process control by showing how bleaching, fibre type, recycled content, additives or process conditions affect brightness, whiteness and colour. This can help teams adjust processes earlier and avoid producing material that falls outside specification.

For paper and board manufacturers, measurement data helps control product consistency across reels, sheets, batches, grades and production sites. Brightness, whiteness, opacity, fluorescence and tint can be monitored to identify process drift, raw material changes or contamination.

For packaging, print and speciality paper supply chains, traceable optical data improves communication between mills, converters, printers, brand owners and customers. Shared tolerances and standardised measurement conditions reduce subjective disagreement and make it easier to approve material based on measurable evidence.

Measurement data is also important where recycled fibre or alternative cellulose sources are used. These materials can introduce variation in base shade, brightness and opacity, so objective measurement helps manufacturers control quality while supporting sustainability goals.

Pulp and paper measurement may require several instrument types, depending on whether the application is pulp brightness, finished paper shade, board opacity, recycled fibre control, coating evaluation, print substrate approval or customer specification testing.

Paper-specific benchtop spectrophotometers

Paper-specific benchtop spectrophotometers are used where high accuracy, repeatability and standardised optical measurement are required. Instruments such as the Konica Minolta CM-3630A are designed for pulp, paper and cellulose-based applications, including measurement of brightness, opacity, fluorescence, colour, whiteness and tint.

These systems are particularly valuable in production laboratories and QC environments where paper grades must be controlled against recognised industry methods and customer specifications.

Portable spectrophotometers

Portable spectrophotometers are useful when samples are large, production-based or inconvenient to bring to the laboratory. They can be used for quick checks of sheets, boards, packaging materials, paper-based components or converted products.

Portable measurement is especially useful for supplier checks, warehouse inspection, production troubleshooting and customer-facing quality investigations where fast comparison against a standard is required. The CM-26d series is horizontally orientated with UV control and a suitable instrument to support paper companies.

Controlled viewing cabinets

Controlled viewing cabinets provide standardised lighting conditions for visual assessment. This is important because paper shade, whiteness and tint can appear different under different light sources, particularly where optical brightening agents or fluorescence are present.

Viewing cabinets are useful for comparing paper samples, assessing customer standards, reviewing printed material and identifying metamerism. They are most effective when used alongside instrumental measurement, combining best practice visual assessment with objective data.

Konica Minolta Sensing offers colour and optical measurement solutions for pulp, paper, board and cellulose-based materials, supporting process control, production QC and customer specification management.

The portfolio includes paper-specific benchtop spectrophotometers, portable spectrophotometers, controlled viewing solutions and software for colour and quality data management. This allows customers to select the right measurement approach for pulp brightness, paper whiteness, board opacity, paper shade, packaging substrates, coated papers or converted products.

Konica Minolta’s paper-focused instruments are designed to measure key optical properties such as brightness, opacity, fluorescence, colour, whiteness and tint, supporting the types of values commonly used in paper and cellulose quality control.

Beyond the instrument itself, Konica Minolta supports customers with application knowledge, training, service and traceable calibration. This helps organisations build repeatable measurement processes, maintain confidence in their data and communicate quality more clearly across mills, converters, suppliers and customers.