TLC Developing Chambers for Horizontal Development

With developing chambers for horizontal development, the chamber type again determines the price. 

Developing chambers for horizontal development were originally conceived as sandwich chambers (S-chambers) in which the plate, with the layer imdemeath, is placed above the counter-plate at a distance of 0.5 mm. Without this counter-plate, a filter paper soaked in solvent can be placed at the bottom of the chamber, enabling development to be performed in a saturated chamber. Chromatography can be performed with only a few ml solvent in horizontal chambers, which is, of course, economic and reduces disposal problems. However, the question arises how much of a four- or five-component solvent system is actually used if only 2 ml is consumed in the development process in the 5 x 5 cm horizontal chamber  

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