Cernit polymer clay is easy to condition and when baked is extremely strong. In many ways it reminds me of the old Fimo from the 80s and early 90s - both in how it handles and indeed the vast colour range.
There are several different ranges - The Number One range contains all the basic colours, many of which are semi-translucent for Cernit's characteristic "porcelaineous" finish. The Nature range has various stone and organic effect clays, the Glamour range is as it sounds - full of shimmer and sparkle. For bright fluorescents, look to the Neon Lights range, whilst glow in the dark clay can be found in the Translucents range, along with one of the clearest translucent polymer clays you could wish for and coloured translucents.
Cernit cures in the oven at 110 - 130 degrees C for approximately half an hour.
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