Excellent! When i first got into molding in silicone years ago, and learning, that sulphur warning was all over the net so i still go by that. Maybe plasticine has changed its recipe lately to compete with all the sulphur free brands? Not sure, I know in America a product called Kleen Klay sounded like our equuivellent of plasticine but was labelled as sulphur free. The list of awesome looking rubbers and Resins they have in the US I'd love to get my hands on! Can't seem to find them in the UK, and shipping is pricey!
Anyway, good job with the tests Ady, better safe than sorry. Can't wait to see the results. :)