I provided mangler patterns and constructed the template for the Open Paper Wallet project. These templates were also used for the Safe Paper Wallet project by Andreas Antonopolous, for which I also contributed their brand logo, and tutorial illustrations for their product.
Mangle patterns on the back side of sheets help to obscure information on the front-side when light is passed through, such as when a sealed envelope is held up to light.
Sets of four paper wallets are printed on a perforated page.
