A colour quality control program is more than a collection of instruments and measurement habits. Done properly, it is a structured system that defines colour standards, specifies measurement procedures, sets tolerance requirements, documents results, and drives continuous process improvement. The difference between a business that has some colour measurement instruments and a business with an effective colour quality control program is the difference between reactive colour management (fixing problems after they occur) and proactive colour management (preventing problems from occurring in the first place).
Building an effective colour quality control program requires decisions across several dimensions: what to measure and when, how to set appropriate tolerances, which instruments to use, how to document and report results, and how to use measurement data to improve processes over time. Each of these dimensions has best practices developed by the colour management industry and supported by X-Rite's instruments, software, and training resources. Seaga Group provides guidance and support for Australian businesses building or improving their colour quality systems.
Define and Store Digital Colour Standards
The foundation of any colour quality control program is a set of clearly defined, instrumentally measured colour standards. For each brand colour or product colour under management, the target L\*a\*b\* values and acceptable Delta E tolerance should be defined and stored in digital form — either in the instrument's memory, in quality management software like Color iQC, or in a cloud platform like PantoneLIVE. Physical samples alone are not adequate as primary standards: they degrade over time and cannot be shared electronically.
When defining colour standards, measure approved production samples rather than using manufacturer-provided reference values alone. A brand's Pantone reference provides the target; the actual production approval should be measured and its L\*a\*b\* values compared against that target to understand the initial tolerance position. This gives production teams a realistic starting point for tolerance-setting that reflects what is actually achievable in their specific production environment, rather than an idealistic target that generates unnecessary rejects.
Set Tolerance Levels Based on Application and Customer Requirements
Colour tolerances should reflect the sensitivity of the end application and the customer's actual requirements — not arbitrary numbers borrowed from someone else's specification. A customer who approves colour visually in good lighting will not notice a ΔE2000 deviation of 1.5; a sophisticated brand owner with their own measurement program and tight contractual requirements may hold to ΔE 0.5 for critical colours. Set tolerances by having honest conversations with customers about their requirements and then verifying that your process is capable of meeting them consistently.
Use different tolerance levels for different colour attributes where appropriate. Many colour management programs use tighter tolerances for hue difference (the direction the colour shifts) than for overall ΔE, because hue shifts are more visually obvious than small changes in lightness or chroma. The eXact 2 spectrophotometer and Color iQC software support multi-parameter tolerance specifications — allowing quality managers to set separate limits for ΔL\*, Δa\*, Δb\*, and overall ΔE, providing more nuanced and perceptually appropriate colour control.
Measure at Critical Control Points
Effective colour quality control does not require measuring every item produced — it requires measuring at the right points in the process to catch deviations early and prevent non-conforming product from reaching subsequent stages. Typical critical control points include:
Incoming raw materials (ink batches, pigment lots, substrate stocks) to verify consistency before production. At press makeready or batch setup to confirm that the target is achieved before full production begins. At regular intervals during production to detect drift before it results in rejects. At end-of-run or end-of-batch to provide a summary quality record. The Ci64 handheld spectrophotometer provides the portability and speed needed for effective sampling at all of these control points in plastics, coatings, and textile environments.
Document Results Systematically
Measurement data that is not recorded is wasted. Every measurement taken as part of a quality control program should be stored in a systematic record — ideally in a quality management software system that links measurements to job numbers, operators, production dates, and substrate information. This documentation serves multiple purposes: it creates a quality audit trail for customer and regulatory requirements, it provides the historical data needed for process improvement analysis, and it protects the business in any dispute about colour compliance.
Standardised measurement reports generated by Color iQC software satisfy most customer and certification requirements for colour quality documentation, and they can be shared electronically without the logistics overhead of physical sample exchange. For businesses seeking ISO 12647 press condition certification or similar quality credentials, systematic measurement documentation is a prerequisite.
Use Standardised Lighting for Visual Assessment
Instrument measurement and standardised visual assessment are complementary, not competing. Pair X-Rite spectrophotometers with a calibrated light booth so that visual approvals — which remain part of most colour quality workflows — are made under standardised D50 or D65 conditions rather than variable factory lighting.
Conclusion
An effective colour quality control program is a structured system with defined standards, appropriate tolerances, systematic measurement, comprehensive documentation, and data-driven process improvement. X-Rite instruments and software provide the technical foundation for all of these elements. Building that foundation systematically — rather than deploying instruments in an ad hoc way — is what separates businesses that genuinely control colour from those that simply hope they do.