micro-fy Magnetic Powder Concentrate Fluorescent is a highly concentrated, fluorescent magnetic powder medium for fluorescent magnetic powder testing under UV light. It is diluted with water at a ratio of 1:40 and produces a brilliant, highly visible contrast that makes the finest surface and near-surface cracks in ferromagnetic materials visible. The optimized sedimentation rate of 0.2-0.4 μm results in a homogeneous particle distribution with minimal background fluorescence – ideal for high-precision testing in safety-critical areas.