Design is prepared at a magnification of 100x
Photographic negative is reduced to the size of finished part
Sheet blank is coated with photosensitive material (Emulsion)
Negative placed over coated blank and exposed to ultra violet light which hardens the exposed area
Blank is developed which dissolves the exposed areas
Blank is then immersed into a bath of reagent or sprayed with the reagent which etches away the exposed areas
The masking material is removed and the part is washed thoroughly to remove all chemical residues