http://pastport.jp/user/chinalabsupplier/timeline/How%20to%20use%20the%20petri%20dish%EF%BC%9F 一、Petri dishes are usually made of solid medium for plate culture (the origin of the name of the plate). The production of plate medium is to melt the sterilized agar medium with warm water (sterile), and remove the cotton plug of the test tube. Pass the ja-JP