From: Joel M. Sciamma (joel_at_inventors-emporium.co.uk)
Date: Sun Dec 28 2003 - 03:31:11 PST
Victor,
> I didn't say anything about CDs. My scanner won't read through the plastic of
> a jewel case either. On DVDs the thin plastic film is much much thinner.
Ah, I don't have a DVD so no comparative examples were to hand.
I tried a 0.2mm sheet of clear, shiny plastic over a barcode and that worked
fine, so did a double-thickness of the same stuff.
Two layers of cloudy polythene bag (0.13mm) were no obstacle but the clear
plastic of a PCMCIA jewel case (1.13mm) was.
The limit seems to be 0.6mm of anything that is more or less clear.
Books and software are perfect candidates for using a scanner but I too have
some difficulty scanning some of the equipment labels which have a speckled,
shiny surface and tightly-packed bars.
Joel.
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