Dye Pen
Dye-Pen Who uses Dye-Pen? Automotive and general engineering companies use us due to Alloy Heat Treatment carrying out dye-penetration to BSI scope approval BS EN ISO 9001: 2015. What? Dye-pen inspection is a non-destructive test method which does not harm the aluminium being inspected. It is done to detect defects. Where? AHT has its own