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Abstract: Cross adsorption of dyes (rhodamine 6J, neutral red, and brilliant cresyl blue) on specially prepared silica gels with enhanced affinity for these individual dyes, caused by preparation in the presence of such a dye and thus having a memory of the specific mol., was described. Typical adsorption curves and data on such adsorption selectivity showed a form of recognition on the mol. level with greater adsorption of the recognized dye mols. Since the last 2 dyes are fragments of the 1st, a relatively high degree of adsorption of them also takes place on gel made in the presence of the 1st (master) dye mols. The latter evidently has a considerable steric factor operative in such adsorption and the information carried on silica gels specific for the last 2 dyes is .apprx. 15 times smaller than that assumed from the silica gel prepared in the presence of the 1st dye. Thus information theory applications allow for a rather rigid anal. of adsorption ability in such systems.