At 09:01 PM 8/30/00 +0100, you wrote:
>Paul Farrar recently (25th August) gave an explanation of squares 1-6 of the
>DX code on the top line of the squares on a film cartridge. Out of
>interest, I was looking at this and at samples of unused 200 and 400 ASA
>Kodak films in the house, and of course the latter are coded as described.
>However my wife pointed out that the second row of squares was not the same
>for ASA 400 Royal Gold and ASA 400 Ultra film - what function do these
>squares have, is it something to do with film processing or are they used in
>the manufacturing process?
>Brian Gray
The second row encodes the number of exposures (squares 2, 3, and 4) and
film exposure latitude (5 and 6). 1 is ground, as on the top row. The system
also specifies the bar coding above the squares -- for automated recognition
by processing equipment, the placement and size of the printing visible
through the film reminder window, and, I believe, the information coded on
the edge of the film.
Paul
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