In UV laser desorption/ionization (LDI) of C , both molecular cations and anions are formed. While the C formation has been discussed in a number of studies and is fairly well understood, the C formation has received less attention. Here, we present measurements of C and C formation and its fluence dependence in UV-LDI of C60 from both metallic and non-metallic substrates. The data show clearly that the C formation is coupled to the C formation, indicating that C is predominantly formed through electron transfer early in the expanding laser desorption plume. The velocity distribution of desorbed C ions was also determined and was found to be best described by two Maxwell-Boltzmann distributions with superimposed stream velocities.