So-called plasticizers are admixed to the synthetic base material and thus provides these erasers with their erasing quality and rubber-like elasticity.
With products containing plasticizers there is a possibility of plasticizer migration. This means: Through the direct contact of these products with other synthetics, the plasticizer is transferred to them.To rule out this undesired effect, FABER-CASTELL synthetic erasers are sealed inside a cellophane wrapping.
Synthetic erasers are encased in a sleeve, so that they can be held more easily during use.
The advantage of synthetic erasers is the large crumbly abrasion which does not tend to adhere to the drawing surface (paper), unlike the dust-like abrasion of natural rubber.