Herbin, 1 kg Plasticine, hardness grade 50. The modeling material retains its strength and leaves no residue when drying. The casting material does not deform after the model is created, as it possesses excellent stability. Plasticine does not dry out in the air, allowing you to work on and modify your model as often as you like. It can be softened, for example, with your hands, a heat gun, or a hairdryer, and it hardens again when cooled in the refrigerator. Packaging: tube, lined inside with sulfur paper and 2 end caps made of polypropylene. Plasticine is a very precise modeling paste with high stability that never dries out in the air. This offers the advantage of being able to work on and change it as often as necessary. It is also used in industry (automotive, aerospace) for creating prototypes or molds. Artists also use Plasticine for reproducing models. The precision of reproduction is accurate to within 0.1 mm.