marks a discontinuity. In LPT it is the presence of bleed out.
LPI indications resulting from conditions not associated with a material discontinuity.
indication resulting from poor technique and not associated with a material discontinuity.
False indication: Indication created by improper cleaning of the test surface by any dirt, paint, oil, grease or any loose scale that could either keep penetrantout of a defect, or cause irrelevant or false indications.