Complex sentence: After the removal of excess penetrant, a white developer is sprayed in a thin, even coating on the surface, to draw any dye which has entered defects to the surface, a process similar to the action of blotting paper.
Split into simpler sentences: After the removal of excess penetrant, a white developer is sprayed in a thin, even coating on the surface. This is to draw any dye which has entered defects to the surface, a process similar to the action of blotting paper.