The joining of two ends of film into a continuous piece. Instruments Optical comparator with a scale graduated in increments of 0.1 mm or 0.005 inch. Optical comparator with a protractor reticule with 1 degree divisions.
Procedure Measure the width of the gap and the alignment of the edge.
Use the comparator to determine if there is any angular misalignment between the two joined ends. Use the thickness gauge to obtain at least three readings along the splice and preceding the splice. Compute the average thickness value and subtract the appropriate number of film thicknesses from this average and record this difference as the splice thickness build-up. Assess a defect in accordance with the Defect Classification Table. Major NOTE 1.