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Board Service Announcements
Re: Criticize my tamper-proof paper wallet design... and steal 0.1 BTC if you can.
by
teff
on 23/04/2013, 11:53:59 UTC
The calibration didn't align the front and back 100%. I used Zoom: 3, Shift: 7 if that helps anybody else.

With any combination of zoom/shift settings, did you manage to get the calibration page to print out perfectly *centered* (horizontally centered, that is?) That's the factor that influences how accurately the front/back line up. For zoom 3 / shift 7, what browser / OS were you using?

If anyone reading this thread is scratching their heads, this is what we're talking about:

http://i.imgur.com/fZlxoaK.png

So far I've had the best success with Safari, pretty good with Firefox & IE, possibly some problems with Chrome.

Any chance there will be an option to specify the size? Would that mess up the Zoom/Shift settings? I think it would be cool to have it the same size as paper currency, but I suppose paper currency has different sizes throughout the world.

Not yet. I'll think about that some, like a "master zoom" function. However the resulting wallets wouldn't size properly for the tamper-evident tape I sourced -- so you'd be obligated to use regular tape.

Using Chrome / Windows 8 printing on a HP CLJ, the zoom and shift didn't seem to do anything at all, but the extra bleed on the back was adequate to make it a reasonable fit, here is the bleed after been cut with the details from the calibration page behind, maybe it just needs extending on that leading edge at the right of the picture

http://i.imgur.com/MfDirzr.jpg?1