I adapted an ink-jet printer to spray square bar codes onto each cigar's cap. It uses food-grade vegetable ink so it is safe. The ink is a bit pricey, but is not very visible except under ultra-violet light. I just scan the code with my phone before clipping a cigar to retrieve info, update the database with the smoke date, and add any notes, pics, etc. (I cut out the UV filter on the phone's LED 'flash.')
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