Fogra, the German research institute within graphic arts production, is about to launch two new reference characterisation data sets, numbered Fogra 51 and 52. They are based on the latest version of the printing standard ISO 12647-2 as published late in 2013.
Now you might wonder why you should get excited about some new colour profiles? The reason why you should pay attention to this is because the Fogra 51 characterisation dataset will replace the Fogra 39 characterisation dataset, which is by far the most popular reference for high quality offset print production on coated paper. Many designers, publishers and printers use this today as the default colour reference for printing, not only in offset litho, but also for flexo, screen and digital printing.
The ‘rule of thumb’ seems to be that when in doubt about the exact printing condition go for Fogra 39. What this really means might not be fully known by everyone in the print production workflow, but it usually works fine.