Place transfer face down onto lighter shell, tape into position
To help prevent the shell shifting (causes image ghosting) or misshaping, put a heat resistant block or folded mat inside the shell to keep it level and steady
Cover with teflon sheet or protective paper
Press at 390ºF for 30-40 seconds using light-medium pressure. Be carefully not to use too much pressure as you can crush or misshape the shell
Remove teflon sheet/protective paper etc, then remove transfer
