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. 2010 Jan 18;7(1):203–228. doi: 10.3390/ijerph7010203

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© 2010 by the authors; licensee Molecular Diversity Preservation International, Basel, Switzerland.

This article is an open-access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/3.0/).

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Figure 24. — Photos of the recycled papers made from three kinds of waste pulp [(a) old newspaper, (b) white ledger, and (c) printing paper] through in-situ process with PCC (10% calcite): whiteness order (a) < (b) < (c) (unpublished photo).