Ranger inks, what’s the difference between Inks and Watercolor pigment Birgit O'Connor and The World of Watercolor Painting

Today Ann told us today about Ranger inks, and how much she is enjoying them, especially the distressed inks. Then our conversation took a turn into what's the difference of inks, alcohol inks and water color pigments and can alcohol inks be used in watercolor competitions. Personally, I found this fascinating information, I hope you will too.
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Ranger inks