Making christening candles is far out of my handmaking comfort zone, and frankly not anything I am the least bit interested in repeating (I don't think. However...)
It seems to me a bit odd and frankly a little grim to burn a picture of your loved one. But convention is as convention does, and I was darned if I was going to pay some other sucker to make the silly thing.
Basically, I went through a range of contortions and tricks to get the photo onto tissue paper, position it on the candle, wrap it in waxed paper, and apply heat. Easier said than done, much ink and wax everywhere.
How this actually works is that the surface of the wax melts, soaks into the tissue and then hardens again. There is no ink transfer as such, and the waxed paper is only there hold the tissue evenly and smoothly against the candle.
I wish one of the many many DIY tutorials I read had explained this, because I spent a great deal of time searching for waxed paper, and eventually gave in and bought greaseproof on the the offchance.
I know the two are different, and can't often be substituted, but in this case they can. Just so you know...
I'm not entriely convinced it won't go up in a ball of flame if it burns down to the tissue (assuming the ribbon and sticky diamantes don't do the job), but I doubt I'll ever find out (see above: squeamishness as incinerating face of small child).