Last year, I was fortunate enough to have to work in a cleanroom once a week, which as the name implies is supposed to be a Very Clean Room. I had largely forgotten about that fun until today, when iGoogle posted in its “how to” section on my homepage these instructions for entering a cleanroom, apparently written by someone who once read about entering a cleanroom. Since this is very helpful knowledge for anyone thinking of getting a job in a cleanroom, and you are by the way insane, I thought I’d pass it on to you.
A cleanroom is an environment, typically used in manufacturing or scientific research, that has a low level of environmental pollutants such as dust, airborne microbes, aerosol particles and chemical vapors. If you have been asked to work in one, you’ll need to take the appropriate steps to avoid introducing contamination.
A cleanroom is a room that has anywhere between 1 (1!) and 1,000,000 particulates of certain sizes (they measure down to 0.1 micron, or 0.0000001 m, particles for the cleanest ones) per cubic foot of air. In comparison, the air in your room is practically a solid block of crap containing five hundred million to a billion particles per cubic foot, some of which you can actually see. In America, the opportunities to spend all day in this hellishly pristine environment are few and far between; a mid-sized class 100 cleanroom can cost millions of dollars to build and takes up tons of space, and they are insanely expensive to maintain. In Asia, where our TVs and laptops come from, labor is cheaper than automation for many cleanroom tasks and thousands of fortunate Chinese technicians get to spend all day, every day in “bunny suits.” Some clean rooms are so clean that people get to wear two bunny suits to go in them, and those are the luckiest people of all.
Aside from regular wiping-down and vacuuming, a cleanroom is kept clean by constantly filtering the air. New air is drawn in from the outside, completely dehumidified and scrubbed, then rehumidified before being forced through the ceiling. The air is drawn through to the floor where it is dismissed as filthy, takes a pit stop in a filter to remove any dangerous vapors, and is chucked back outside. I forget why they don’t recycle, but rest assured there is a very good reason because all of this filtering is not cheap and cleanroom administrators all over the world would be very, very interested in making that process less costly.
The reason for all of this excessive care is to protect delicate and expensive processes from the dirty dirty world, and no part of the world is filthier than you and your clothes. For this reason, there is a special outfit and elaborate gowning procedure that anyone who wishes to enter a cleanroom must follow. Go to the bathroom first, because this is going to take awhile. I’ll wait.
Ok, ready? Let’s go:
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