Photoresists used in the experiment has the positive polarity (positive), because an exposed portion is removed, and the photoresist film is left in the bottom part without the photoresist is etched only.
The experiment used the photo registers are constant polarity (Positive) will be removed because it is part of the exposure, the film has been shortlisted for the photo under the photo registers registers are not part of etch.
Test the polarity used in the photo register (Positive) because it is a part of the light was removed, and photo register below the thin film of the South, and photo register is not part of the name.