From Madder to Alizarin A Convoluted Journey

In the game of cricket a skilled bowler can deliver a ball with a high velocity and elusive spin. For a batsman trying to make contact, the only visual cue for when and where to swing the bat is a split-second flash of the glossy red cricket ball. To 

Alizarin is the major component purpurin does not occur in the freshly cut root, but only in roots that have been placed in storage, because of the decarboxylation of pseudopurpurin [13]. Although purpurin is a dye in its own right, it is usually considered an undesirable contaminant of alizarin extracted from the madder root 

Here we see a pair of 1-hydroxyanthraquinone molecules forming a neutral 2 1 complex with a divalent metal ion. If the ion, due to electrostatic or ionic bonding interaction is fixed in the fiber, then the dye molecules are also fixed. However, since this is a chemical reaction, then changing the metal ion will change the identity of the complex, and hence, the color. Alizarin, for example, when 

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