Intrigued by the persistence of lichenologists to prefer Lugol's over Melzer's , I uncovered the following references:
http://www.namyco.org/docs/Melzer__Lugo.pdf
http://www.gbif-mycology.de/HostedSites/Baral/IodineReaction.htm
It seems that while Melzer's can give better reactions in the right conditions it also can mask some reactions because of one ingredient of its cocktail (I'm looking at you, chloral hydrate).
Since I'm a bit hamfisted wen it comes to the chemical reagent I like to throw Melzer's on things, but I may have to refine my inspection techniques if I'm going to mess around with ascos, including lichenised ones.
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