Detecting Surface Flaws with Visible Contrast
Visible Dye Penetrant Testing (PT) is a cost-effective and simple method to detect surface-breaking defects such as cracks, porosity, seams, and laps. It works by applying a red dye penetrant that seeps into discontinuities through capillary action.
After dwell time, excess penetrant is removed, and a white developer is applied. This developer draws the dye from defects, forming visible red indications on a contrasting white background under normal lighting conditions.
BQCIS technicians perform Visible Dye PT according to ASTM E165 and E1417 standards using approved materials and controlled conditions. It’s ideal for workshop or on-site inspections, providing rapid, direct visual evidence of flaws that could compromise part integrity.
Key Visible Dye PT Activities
Key Benefits of Visible Dye PT
Portable and Versatile
Ideal for both workshop and field inspections, suitable for metals, ceramics, and selected plastics.
Cost-Effective
Minimal equipment requirement—no power source needed, only penetrant, remover, and developer.
Immediate, Clear Indications
Provides instant red-on-white visual contrast under natural light for clear detection and interpretation.
Detects Fine Surface Flaws
Highly sensitive to small cracks and porosity that are not visible to the naked eye.
Success Story
Visible PT Identifies Cracking in Cast Components
A foundry required inspection of cast aluminum parts for cracks or porosity before final machining and shipment.
BQCIS technicians performed Visible Dye Penetrant Testing using the solvent-removable process on cleaned castings under white light.
Fine red linear indications revealed shrinkage cracks, enabling process adjustments that eliminated future defects and prevented defective shipments.