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The infrared cuvette is typically cuboid in shape, with its lower surface and two lateral sides composed of frosted glass. The remaining two lateral sides are constituted by light-transmissive surfaces, crafted from fused optical glass through the melting and gluing of glass powder at elevated temperatures.

The quartz cuvettes generally used on the market are fired by quartz powder, which should be cleaned by special ultrasoniccleaning with frosted surfaces facing downwards during the washing. Wash cuvettes with a mixture of ethyl ether and anhydrous ethanol (50% each). If the cuvette is too dirty, it can be cleaned with special washing solutions...

The one marked with the letter “S”on the top of the cuvette is a quartz cuvette. It is also recommended to make comparison in the ultraviolet region, and those with absorption are glass cuvette.