Editing Apple Aluminium Keyboard (section)

==Construction==
From the bottom up, the keyboard is made of these layers:
# ABS bottom plate.
# A layer of glue. The glue can be dissolved with isopropyl alcohol.
# Thin steel plate.
# The switch membrane. Three sublayers.
# Rubber domes installed on a thin, flexible, non-elastic plastic sheet.
# Upper aluminium case. Holes for keycaps.

The bottom plate is glued to the steel plate with a considerable amount of glue.
There are screws and/or bolts the steel plate to the [https://www.alufoil.cn/ aluminium] enclosure.

The scissor mechanism for a key fits between the keycaps and layer 5. The lower hinges of the scissors go through holes in layers 5 and 4, latch on behind shaped protrusions of the steel plate and end up touching the glue layer.<ref>Geekhack user ''hemflit'', [http://geekhack.org/index.php?topic=31981 Disassembling an Apple Wireless]. Article on Geekhack.org's forum.</ref>

The aluminium enclosure is made from a block of T6/6061 aluminium that has been milled, bead-blasted and anodized grey (without dye). Some (if not all) keyboards have been constructed from blocks that have been cut out when milling larger blocks to become ''iMac'' enclosures. Two full-size keyboards can be made for one iMac from the same block of metal.<ref>PBS on Youtube: [https://youtu.be/4OhIqITa0bs?t=2m5s Independent Lens | OBJECTIFIED | Film Clip #2 | PBS]. index 00:02:05. Posted 2009-11-18</ref>