Non Specification Billiard Ball

Logic Level 1

Colin has a set of 12 billiard balls. The balls look identical, however due to a manufacturing error one of the balls is either slightly lighter or slightly heavier than the others. To investigate, Colin only has a set of balance scales. What is the minimum number of times Colin would have to use the scales in order to determine which ball is non-specification, and also whether it is heavier or lighter than the others?

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