Texes Art EC-12 Practice Exam

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What is a primary drawback of casein paints?

They are very expensive
They get rancid
They are difficult to apply
They have limited color options

The correct answer is: They get rancid

The primary drawback of casein paints is that they can get rancid. Casein paints are made using milk protein (casein) as a binder, and if not stored properly, they can develop an unpleasant odor and spoil over time due to the organic nature of the ingredients. This can limit their shelf life compared to synthetic alternatives. While casein paints are favored by artists for their rich texture and quick drying times, the risk of rancidity is a significant concern, especially for those who may store them for longer durations or in less-than-ideal conditions. In contrast, factors such as expense, application difficulty, or color options may play a role in an artist's choice of paint, but they are not as universally significant as the issue of rancidity. Some artists appreciate casein paints specifically for their unique qualities despite these potential drawbacks.