Blooming and white spot on my Slabs!!
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Tech Help, Tips, Tricks, Techniques
I'm afraid that you may need to do a bit more reading on the subject of chocolate tempering.
Putting things in a really simplified way:
1. In hot (over 40-45C) chocolateall the cocoa butter present will bemelted, no crystals present.
2. Such chocolate needs to be cooled to around 25-28C so some of the cocoa butter present will crystalize. This crystalization will produce a variety of crystal forms (cocoa butter is polymorphic which means that it can crystalize in many different types of crystal forms).
3. Chocolate cooled in previous step with different forms of crystals is warmed up to 29-31C which melts the unstable crystals leaving only stable ones. This is tempered chocolate and can be used to form products that will not bloom and look good.
This is a very general process description and temperatures are just for indication.
In your case if you take the tempered chocolate and melt it at 40C you effectively melt all the cocoa butter crystals making chocolate untempered.
If you make product with such chocolate it will bloom.
If you have your bought chocolate already tempered you may try seed tempering where you add some solid tempered chocolate to liquid chocolate. Something along these lines:
http://www.bbcgoodfood.com/howto/guide/how-temper-chocolate