Black Newplast modelling clay.
Newplast is a non-drying, re-usable modelling material..
It is still available in the traditional layered bar form familiar to many generations of children and adults.
Newplast is sufficiently pliable to make a wide variety of models, but is firm enough to retain its shape indefinitely.
Newplast is the material specified by most animators as being the only fit-for-purpose product of its type available.
Similarly, it is used extensively in education and in industry, for a wide variety of applications ranging from construction to medical device manufacture.