The formation of ice on the bottom of the tubes can make the reading process difficult. This is especially true, if the samples are stored in the nitrogen gas phase. So that the 2D codes can be read quickly in such cases, it not only requires a good reader but also the rapid removal of ice from the bottom of the tube.
The defrost roller is the perfect accessory for this purpose. Two rollers are required for optimal application. The reservoir of the first roller is filled with an ice dissolving liquid, preferably ethanol. Contact with this roller dissolves the ice, while the second roller is used for drying. This approach will facilitate the checking of samples.
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