12 Oct
2005
12 Oct
'05
4:03 a.m.
The HP 9120 printer uses electrosensitive paper comprising a black
polyvinyl alcohol layer on the base paper with an aluminium layer over
that and a top layer of zinc oxide (conductive) plus organic binder.
The writing head had a seven high array of tungsten stylii that
applied current pulses to the paper and vaporised the thin aluminium
layer, exposing the black polyvinyl alcohol layer underneath.
Still have many boxes of the paper here, the roll is about three
inches or so wide.
DaveB, NZ
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