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Ok, this page is DANGEROUSLY incomplete and out of date
1) The most important ways to make PPVs are probably the gilch, vanderzande and wessling-zimmermann methods. None of these are mentioned.
Also there are commercially available PPVs such as super yellow.
This page gives -at the moment- a highly distorted picture about PPVs — Preceding unsigned comment added by 12.106.143.2 (talk) 20:02, 4 October 2014 (UTC)Reply
