A print spectrophotometer must do more than produce L*a*b*. It must support the measurement condition, geometry, aperture, backing and data exchange used by the customer or process standard. Packaging adds textured board, translucent film, small brand marks, white inks and finished constructions that make sample handling as important as instrument specifications.
List every application before comparing models
| Application | Capability direction |
|---|---|
| Press-side solids and control strips | Portable graphic-arts reflectance, suitable aperture, fast positioning and required M conditions. |
| Brand and spot colors | Stable spectra, correct backing, small-patch capability and compatible color-difference/data exchange workflow. |
| Paper and board | Diffuse geometry, controlled UV calibration and supported whiteness, brightness and opacity methods. |
| Films and transparent structures | Benchtop transmission or a controlled backed-reflectance method with suitable holders. |
| Finished packs | Portable access or fixtures that hold curved, flexible or textured samples consistently. |
Confirm condition, geometry and UV control
If the workflow cites ISO 13655, confirm the exact M conditions required—especially M1 for OBA-containing papers. Do not infer compliance from a generic UV lamp or a software option. Check geometry against the specification; d/8 sphere instruments are valuable for material and paper measurements, while graphic-arts 45°:0° or 0°:45° workflows may require dedicated conformance. One geometry cannot be numerically substituted for another.
Match the aperture and accessories to real samples
Measure the smallest control patch, largest substrate variation and most difficult finished pack you expect. Confirm both illuminated and viewed area, camera positioning, white/black backing accessories, paper stack handling, film holders and the ability to keep curved samples flat. Larger apertures represent mottled board better; smaller apertures fit brand marks but increase sensitivity to local variation.
Evaluate performance in your workflow
- Repeatability without moving, then after realistic repositioning.
- Inter-instrument agreement between plant, supplier and laboratory units.
- Agreement on fluorescent paper under the specified UV condition.
- Stability near commercial tolerances and across dark, saturated colors.
- Calibration, verification, service, standards and operator workflow.
- Spectral export, target exchange, audit trail and reporting compatibility.
Manufacturer reference-condition figures are not a guarantee on corrugated board, small patches or curved packaging. Run a gauge study with approved and borderline samples.
Choose the platform around the method
The SD-700 UV is the strongest portable direction where UV-included/excluded reflectance and 8 mm/4 mm apertures suit the task. The SD-500 suits many routine portable solid-color checks. The SD-800B adds benchtop reflectance, transmission, haze and four apertures; the SD-900B adds a xenon source and higher stated reference-condition performance for demanding laboratory workflows. Confirm formal graphic-arts M-condition and method compliance for the exact model/configuration before specifying it. Use the complete print and packaging guide to write the method first.
Last reviewed 22/09/2026 · Level: Intermediate
Topics
Applications
Related knowledge
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