User Manual

Product information
Erasers - Sharpeners
1.6 Polymer eraser blocks
Erasers made out of polymer, such as polyvinyl chloride, first appeared in the mid fifties. They
began to be produced at STAEDTLER in 1960.
In 1967, STAEDTLER became the first company to manufacture these erasers using the so-
called extrusion process. The main advantage of this method is that it is a continuous, energy-
saving manufacturing process.
Our eraser blocks offer excellent erasing results and – even when stored for longer periods of
time – they do not deteriorate in quality. Their elasticity and, as a result, their superb erasing
qualities remain unchanged.
Components
 Polyvinyl chloride
 Fillers, e.g. chalk, kaolin
 Colour pigments (heavy metal pigments are not used)
 Special softening agents
The eraser holder 528 50 has the same composition.
The blue part of the Mars plastic combi is a drawing ink eraser. It contains solvent droplets
which are released and develop drawing ink dissolving characteristics when the eraser is used.
The rasoplast combi contains glass powder in its blue part for the removal of ink marks.
1.6.1 The new Mars plastic
Mars plastic and Mars plastic combi are STAEDTLER’s new premium erasers.
Their improved formula guarantees superb erasing performance at all times on a whole variety
of surfaces leaving clean, practically residue-free results and causing significantly less
crumbling.
 2002 STAEDTLER MARS GmbH & Co. Page 6 of 13
version 07. 2002 subject to change
Illustration 3:
Eraser performance of the new Mars plastic
Illustration 4:
Crumbling: old - new