To make the candle I just printed the text onto tissue paper, I find it works better if you iron the tissue paper first. Then I cut away any excess paper and laid it out on the candle, you might need a tiny bit of glue to hold it in place. Cover with a piece of greaseproof paper and gently heat with a heat gun, or a hairdryer works fine too, until the paper has melted into the candle and you can no longer see it IYKWIM. Different candles have different melting points but generally it only takes a couple of minutes.
My candles done at last -