All books and blocks are made of Galaxy® cleanroom paper (100 g/m²) Class B and are packed in the cleanroom. All of the pages are squared in 5 x 5 mm size. Our books are stapled; the blocks are bound using durable plastic spirals.
The covers of the college blocks are made of 0.8 mm thick polypropylene with fine embossing for a better grip and rounded corners for convenient handling.
Clear & Clean GmbH
Blocks and Books