DYE PENETRANTOPERATINGINSTRUCTIONSHOW TO USE YOUR SPOTCHECK® KIT

The dye penetrant method of inspection with Spotcheck® is a non-destructive test for defects open to the surface. It may be used onsuch materials as aluminum, magnesium, brass, copper, cast iron,steel, stainless steel, carbides, stellite, certain plastics and ceramics.The essentials of the method are: penetration of the defect by the DyePenetrant - removal of the excess Penetrant from the surface -development of the indication - inspection. A deep red indication willmark the defect.

Surfaces should be free of foreign materials and paint. Grease, oils,etc., prevent penetration and should be removed by precleaning withCleaner/Remover or by solvent degreasing. Scale, sand, dirt, etc. trappenetrant and hinder removal, therefore wire brushing or similarprecleaning is necessary. Paint must be removed from areas to betested.

1. Cleaning - For precleaning, coat the part orsection to be inspected with Spotcheck®

Cleaner/Remover. Allow cleaner to remain on partlong enough to dissolve dirt or film. Wipe dry with aclean cloth. Repeat if necessary. After final cleanwiping, allow time to dry before using Spotcheck®

Penetrant. Clean the same day inspection isconducted.

1. Cleaning

SPOTCHECK®

S pray or brush the part orsection to be inspected so that surface iscovered with S potcheck® P enetrant. If P enetrantpulls back in droplets s top and clean part again.(R efer to S tep 1). Allow P enetrant to remain onthe part from 10-30 minutes . Longer penetrationtimes may be needed for locating extremely ne,tight discontinuities .

When suf cientpenetration time has been allowed, wipe thesurface clean with a clean towel or cloth. R epeatif necessary. S ome surfaces will require onlywiping. In general, however, remove excesssurface P enetrant with clean cloths premoistenedwith C leaner/R emover. DO NOT us h s urfac ewith C leaner/R emover bec aus e this will impairs ens itivity. R epeat this procedure with additionalwiping until res idual surface P enetrant has beenremoved.

S hake the pressurecan vigorous ly until the agitators rattle ins ide, orthoroughly s tir bulk Developer. S pray the part orsection to be inspected with S potcheck®

Developer, just enough to wet the part thinly andevenly, no more. P roper thickness will dry to aneven white layer. Too much Developer will maskindications ; too little will not develop theindication suf ciently. For ease of application,hold spray can 8 to 12 inches above part andspray short 6 to 8 inch sections at a time. AllowDeveloper to dry. Watch for large cracks to showup immediately. S maller cracks may take a fewminutes to develop the best indication.

Defects will be marked by a deep redS potcheck® indication. A line or dotted line marksa crack, lap, forging burst or cold shut. If wideand deep, the indication will grow and spread.P oros ity, shrinkage, lack of bond, and leaks willappear as dots or local areas of color. These, too,will grow and spread if the defect is large orextens ive.

155 Harlem Ave Glenview, IL 60025(847)657-5300 fax:(847) 657-5388