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化學配方數據庫

配方類型：	PHOTOGRAPHY
配方說明：	Glycerin "Sandwich" for Photography
配方組成：
配制方法：	For enlarging a photo from a wet negative, make a glycerin "sandwich," using glass carriers. To do this, a little glycerin goes onn the center of one glass, then the wet negative, then a little more glycerin topped by the other glass. Air bells are removed by squeezing lightly.

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