This papers shows that frothers such as aliphatic alcohols (C_nH_2n+1OH), poly(propylene glycols) (HO(C₃H₆O)_mH), poly(propylene glycol) alkyl ethers (C_nH_2n+1O(C₃H₆O)_mH) and poly(ethylene glycol) alkyl ethers (C_nH_2n+1O(C₂H₄O)_mH), can be used for collectorless flotation of a sample of carbonaceous copper shale manually separated from the Kupferschiefer stratiform copper ore. It was shown that flotation is influenced by the type and dose of frothers. The best flotation results were obtained with tri(propylene glycol) butyl ether C₄P₃, tri(propylene glycol) propyl ether C₃P₃ and tri(propylene glycol) P₃. For these frothers, the yield vs. frother dose relationship was in the form of convex curves indicating that carbonaceous copper shale can float at relatively low dosages of the frother. It means that these frothers can be used for pre-flotation of carbonaceous matter from the investigated copper ore. Other frothers formed concave yield–frother dose relationships and were less effective.