As another consequence, successive heating/cooling has been observed to cause crazing (or elephant skin formation) on the sample surface, which also propagate to the depth of the specimen. Although these small unoriented connected cracks are typical of an unstressed vulcanizate, the difference in shrinkage leads to the build-up of stresses and the development and propagation of microcracks. The possibility of surface erosion due to spraying cycles cannot be ruled out.