"The master is most skilled in ceramics and bronzes," he said. "When they create forgeries, they mix an almost transparent paint using ancient methods and place a tiny dot on a concealed spot of the counterfeit—a dot barely larger than a sesame seed. It's nearly impossible for most people to discover, and even if they do, they wouldn't care because what matters to them is the overall quality of the antique."
"The detection method is simple, too. You just rub some chemical on the spot where the paint is applied, and the paint turns red. After wiping off the chemical, the small dot reverts to its original state," continued Wang Qi.
An almost translucent dot? And placed in a rather hidden location? Indeed, this is an excellent method; the average person really wouldn't notice, and the way to check is incredibly clever. Worthy of a grandmaster of forgery.