Polyaniline base was protonated by blending with camphorsulfonic and picric acids in the solid state. The electrical conductivity of the equimolar mixture was more than 10(7) times higher compared with the conductivity of components used for blending. The electrical conductivity still increased several times after heating of mixtures to 85 degrees C. The protonation is reflected by the changes in the infrared spectra. The dependences of the electrical conductivity on the composition of blends differ for the partly protonated polyaniline and mixtures of protonated polyaniline with an excess acid.