After making about 30 image transfers to curvy blocks of wood this is my work process. I owe big thanks to Gary Wornell who thought me this method and has given helpful hints.
These are the steps I follow. And they work for me and for shaped wood I have been using. By changing paper, medium or surface you can get different results.
1. Print image to matte paper. If you have text or otherwise directions matters mirror your image. I use Epson Archival Matte or Enhanced Matte paper and Epson Stylus Photo R3000 printer
2. Apply transfer medium to wood surface. I use Royal Talens Gel Medium (glossy) from Amsterdam series.
3. Apply transfer medium to print.
4. Attach print to the wood surface.
5. Remove air bubbles.
6. Remove excess transfer medium from paper and wood.
7. Let dry for two hours in minimum or overnight.
8. Sand paper a bit and moisten with water.
9. Rub paper gently to remove it.
10. You can moisten your fingers to help remove paper.
Image transfer can be used to transfer printed images to various surfaces. I’ve tried glass, metal, plastic and ceramic tiles. With these surfaces you need to wait longer for gel medium to dry. It might also be a good idea to put a layer of gesso under image transfer to get light colours and white to the transferred image.