Kbase Article of the Week: LaserWriter: Composition of the Drum Coating →

Apple Support:

The LaserWriter drum is an organic photo-conductive layer laid on the surface of an aluminum cylinder. The ingredients of the organic layer are:

aluminum alloy 95.0-98.0 – –
titanium dioxide
(13463-67-7) 0.5-2.0 * 15mg/m3(TWA) 10mg/m3(TWA)(Dust)

Binder resin 0.5-2.0 – –
Organic semiconductor 0.3-0.8 – –

Carcinogens: no ingredient is listed on the latest NTP Annual Report on carcinogens, IARC Monograph, or OSHA listing.

I have no idea what any of this means.