Step 6: Create QR Codes

Create a bunch of private keys at bitaddress.org.

Sample QR Code (scan with Coinbase or Blockchain wallet)

Convert private keys to 176 x 176 pixel QR codes (sample pictured above).

Convert QR codes to thermal printer format. Sample QR code in thermal printer format:  BTC_4.btc 

Here’s a hack that makes this process a snap:

https://github.com/mayosmith/BitcoinQRMaker

Here’s are two wallets that can read the QR code:

Coinbase Wallet

https://blockchain.info/wallet/