Laboratory test device for textile samples

In a laboratory test device for textile samples in a testing liquid of the type for carrying out reproducible fastness tests and dyeing tests, having a tank for accommodating a heating liquid and a plurality of liquid impermeable test containers for holding the textile samples, said containers are detachably secured to at least one support member and are movably disposed in the heating liquid whereby the test containers are continuously tumbled within the heating liquid, wherein the improvement comprises the test containers being attached in groups to the support member which includes two parallel, coaxial drive wheels of the same diameter positioned a certain distance apart and means for rigidly linking the two drive wheels to each other, driving means cooperating with said support member being located in the tank, said driving means including at least one pair of horizontal, parallel shafts which are simultaneously driven to rotate at the same speed and which have a plurality of roll bodies disposed thereon, the peripheries of which rotate at the same speed, and the outer surfaces of said roll bodies being positioned on said at least one pair of shafts to engage the perpheries of said drive wheels.