micro-fy Magnetic Powder Suspension Waterbased Black Plus is a ready-to-use water-based magnetic powder suspension with increased magnetic powder concentration for black/white magnetic powder testing under daylight. It is used for the particularly reliable detection of surface and near-surface cracks in ferromagnetic materials. The higher proportion of magnetic powder particles results in increased sensitivity, allowing even finer cracks and defects to be visualized than with standard suspensions. The optimized particle distribution ensures a uniform, stable display despite the increased concentration – ideal for demanding testing tasks where maximum informative value is required without additional dilution or mixing steps.