Acetone: Acetone is a cleaner used to remove the resist layer after etching a circuit board as well as a good general purpose cleaner. It does not leave behind a residue. It is available at hardware stores. Use by applying on a cotton cloth and rubbing the board to be cleaned. Make sure you have proper ventilation when using. Acetone is flammable.

Ammonium Persulphate: Ammonium persulphate is used to remove or “etch” copper from a printed circuit board. It is supplied in dry form, and mixed with water when ready to use. A mixed solution has a shelf life of approximately six months.

Annular Ring: The circle of copper around the hole of the through-hole component minus the drill hole size.

Anvil: An anvil is used when installing barrels ...

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