The BST iPQ-Check is a 100% print image inspection system designed for real-time quality assurance on web-fed printing, packaging, and converting lines. It captures the entire web width continuously using up to four RGB line scan cameras and compares every printed image against the pre-press PDF master — detecting and classifying defects as small as 0.01 mm² at production speeds up to 1000 m/min.

How does PDF-based inspection eliminate setup waste?

Unlike traditional inspection systems that require a "golden sample" teach-in from an approved printed reel, the iPQ-Check references the pre-press PDF file directly. This means inspection is active from the very first meter of production — no setup waste, no waiting for operator approval, and zero risk of a defective teach-in sample. The system performs pixel-level comparison between the live RGB scan and the rendered PDF, flagging deviations in color, registration, or missing elements. For digital printing workflows, the iPQ-Check Digital variant supports fully automatic job changeover with variable format lengths and seamless multi-job roll handling.

What defect classification and reporting does it provide?

The iPQ-Check categorizes defects as process-related (repeating, requiring press intervention) or sporadic (one-off, requiring removal), using intelligent algorithms to suppress nuisance alarms from acceptable process variation. The optional Haze Guard flash illumination reveals low-contrast defects such as color fogging or missing varnish that conventional lighting misses. A track-related event logger records each defect with its class, running meter position, defect image, and reference image, generating a complete roll log report for quality documentation. Integration with label inserters and rewinders automates defect marking and positioning for downstream removal. The SMARTData API exports inspection data in XML format to MES, ERP, and workflow systems for enterprise-wide quality traceability.