Hello! I have been considering purchasing some Thompson crackle enamel because I really like the effect. I was wondering if these are even suitable for torch firing? Without access to a kiln it would be a complete waste if they aren't suitable for torch firing. I came across directions for using this enamel and i am aware that to use the crackle base you need to use Thompson's Painting enamels on top, so I really don't want to purchase these new enamels until I'm sure I'll be able to use them... If anyone has used crackle enamels with a torch successfully, please let me know. I would be very grateful!!! Also any tips or tricks to using them would be greatly appreciated!
Thanks!
-Kaleigh H.

Tom Ellis  on Crackle Enamel - 

  He suggests you order the Thompson Workbook which on page 26 will guide you through using the Crackle Technique - and yes you can Torch fire - there are specific procedures to follow to get the crackle to "crack" - applying low expansion enamels on both front and back of the copper piece and the copper piece must be thicker than the coats of enamel - so that it can exert sufficient force to crack the first coat. Copper, silver and aluminum are the only suitable metal bases when using enamels within their normal firing temperatures.  Enamels which can be used are 1020-2008-1997- 1006 -

Thanks so much!