MAGNAGLO® 14HF and 410HF are oil-based, ready-to-use fluorescent inks for wet method magnetic particle testing. They give clear bright yellow/green indications when viewed in a darkened area under UV(A) of peak wavelength 365nm. Used in conjunction with suitable magnetising equipment, our fluorescent magnetic inks will locate medium-fine surface and slightly sub-surface defects. 14HF is widely regarded as the material of choice for aerospace applications.