Abstract: Under certain conditions, adsorbed mols. can imprint distances between their functional groups on a resin. This "coinage" is stereospecific; in renewed adsorption, it enables the resin to "recognize" the stereoisomer that had produced the coinage, besides another isomer with a different group distance, and thus to select it. Different phenol-PhNH2-HCHO copolycondensates were treated with the stereoisomeric dyes Bordeaux R and Bordeaux G in 11 crossing expts. On the av., the resin coined with Bordeaux R adsorbed 4.13 times the amt. of Bordeaux R that was adsorbed by the same resin after treatment with Bordeaux G. The dye Bordeaux G was unable to coin the resin because of intramol. salt formation.