Chrome plating is only a few microns thick. It was invented in the 1930's to stop nickel tarnishing. Items only stay in here a few minutes.
Chromic acid is one of the most harmful substances known to man, a single splash can cause severe ulcers. Health and safety are major concerns.
Cleanliness is paramount to the whole plating process.
Components will go through numerous acid dips, water swills, hot caustic scrubs and electro cleaners before and between each plating process.
This cleaning process is lengthy, but of vital importance to ensure a good result and good adherence.