The generic methodology to perform this NDT technique may
comprise a set of 8 stages, as schematically illustrated in Fig. 1.
Depending on the material properties, bacteria type and product
geometry, some stages can be suppressed, or applied in different
variants.
Stage 1 comprises the location of the area to be inspected.
Stages 2 and 3 can be performed according to the conventional
procedures commonly used in dye penetrant NDT technique.
Stage 4 is one of the most relevant for the success of the technique
aiming to favour the penetration and adherence of bacterial cells