>> In particular, Code 39 uses thin and thick bars and spaces. On my 
>> barcode, thick is twice the size of thin, but on the real barcode it 
>> seems to be something like 2.5 or something. (Obviously, you can't 
>> easily represent this as a sequence of 1s and 0s. But hey, that's the 
>> Real World for ya...)
> 
> As I mentioned earlier, Code 39 doesn't require a particular 
> narrow-to-wide ratio. There may be maximum and minimum limits, but 
> anything in between those is fair game.

...which is probably why it's been printed at 2.5. That would mean it 
definitely falls within the limits, regardless of print tolerence.

-- 
http://blog.orphi.me.uk/
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