Book pages artificially yellowed (by leaving them in the sun, or very carefully baking them in an oven at a low temperature) make terrific faux-antique wall decoration.
书也可以人工变黄(通过放在太阳下晒，放入烤箱低温非常小心地烘烤)来做成极好的仿古董墙装饰。
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This baking varnish has lots of advantages such as high decoration, high protection, high weather proof ability.