FerroChem makes Ready to use Fluorescent Ink and luorescent Magnetic Ink, FerroChem Luminous Supreme, is used for crack detection by magnetic particle inspection under UV or black light in dark conditions. The cracks are visible as fluorescent yellow green lines when viewed under UV or black light. FerroChem make ready to use fluorescent magnetic ink, FerroChem Luminous supreme is packed in 420 ml net capacity Aerosol can for applying on the job surface. The suspension medium used is colourless, odorless, low sulphur & chlorine, petroleum based, high flash point oil. The suspension medium does not cause skin irritation thus making the use very user-friendly at sites.