Product Data Sheet
         101
         Oil-based Fluorescent Magnetic Ink
         BYCOTEST® 101 is an oil-based, ready-to-use fluorescent ink for wet method mag-
         netic particle testing. The perfect choice for critical applications, it gives clear, fluo-
         rescent, yellow/green indications when viewed in a darkened area under UV(A) light 
         of peak wavelength 365nm.
         Used in conjunction with suitable magnetising equipment, 101 will locate medium-fine surface and 
         slightly sub-surface defects in ferrous materials.
         BENEFITS                                                     SPECIFICATION COMPLIANCE
         Detects more indications                                       •  AMS2641
           •  Finds smaller, finer indications  in critical             •  AMS3044
            applications                                                •  AMS3045
         Minimises inspection time                                      •  AMS3046 (Aerosols only)
           •  Clear, bright indications form quickly with               •  ASME B & PV Code, Sec V
              minimal background fluorescence                           •  ASTM E709
         Improves inspection consistency and reliability                •  ASTM E1444/E1444M
           •  Maintains system performance over longer                  •  EN ISO 9934-2
              periods of time
           •  Conforms to multiple industry specifications.           APPLICATIONS
                                                                      Defect location: surface and slightly subsurface 
         FEATURES                                                     Ideal for: 
           •  Ready-to-use                                              •  Detecting very fine to fine discontinuities
           •  Clear, bright indications under UV light                  •  Critical applications
           •  Low maintenance, oil-based suspension                     •  After secondary processing
                                                                        •  In-service inspections
           •  High sensitivity                                          •  High strength alloys
           •  Excellent fluorescent contrast for quick                Ideal for:
              identification and better inspection quality              •  Shrink cracks
           •  Excellent particle mobility                               •  Welding defects
           •  Good dispersion stability                                 •  Grinding cracks
                                                                        •  Quenching cracks
           •  Great concentration consistency                           •  Fatigue cracks
           •  Superior surface wetting 
           •  Even surface coverage for better detection
         Revised: January 2023                                                                               www.magnaflux.eu
                                                                                     Product Data Sheet
        101
        COMPOSITION                                          INSTRUCTIONS FOR USE
        A suspension of fluorescent magnetic particles in    Clean the component before testing to reduce 
        a high-flash, low-odour petroleum distillate.        the risk of contamination and provide a suitable 
        PRODUCT PROPERTIES                                   test surface.
         Form and colour        Light brown suspension       Mix the ink thoroughly and keep it agitated during 
                                                             testing.
                                             oC
         Flash point                     -40                 Apply the ink by spraying, flooding or immersion,  
         SAE sensitivity                  8 - 9              depending on your chosen method (see below):
                        o                      2
         Viscosity at 38 C             2.5 mm /s             Shake the aerosol can for 30 - 60 seconds to 
         Settlement volume        0.1 - 0.25 ml (1 hour)     ensure that the ink is mixed thoroughly. You will 
         Magnetic particles             MG 601               need to shake the can repeatedly during use. 
         Particle size range            3 - 5 µm             Spray the ink onto all surfaces of the component. 
         Sulphur content              < 200 ppm              The indications will be formed during the applica-
         Halogens content             < 200 ppm              tion of a magnetising current. 
                                                             After inspection, the components should be 
        Like all Magnaflux materials, 101 is closely         properly demagnetised before cleaning.
        controlled to ensure batch-to-batch consistency, 
        optimum process control and inspection               PACKAGING AND PART NUMBERS
        reliability.
        USER RECOMMENDATIONS
                                    Magnetic Particle  
         NDT Method               Testing, Fluorescent,        008A170 (x 10)
                                      Wet Method
                                        o        o
         Storage temperature          10 C to 30 C           HEALTH AND SAFETY
                                         o       o
         Usage temperature*           -10 C to 50 C          Review all relevant health and safety information 
         Suspension Vehicle              Carrier II          before using this product. For complete health 
         Cleaners                    C5, C10, SKC-S          and safety information, refer to the Safety Data 
         UV lamp                   EV6000, EV65000,          Sheets, which are available at www.magnaflux.eu
                                         ST700
                                    Centrifuge Tube,
         Accessories              MTU No.3 Test Block 
                                    (EN ISO 9934-2)
        * For use of an inspection vehicle conforming to 
        AMS2641, minimum temperature is 6 °C.
        Revised: January 2023                                                                   www.magnaflux.eu