This paper introduces a new class of size-controlled and non-conductive black particles based on the preparation of monodisperse spherical polymer particles from 1,5-dihydroxy-naphthalene and 1,3,5-trimethylhexahydro-1,3,5-triazine and subsequent low-temperature calcination. The versatility of our method can be emphasized by one-pot polymerization in a simple solvent system without any surfactant, and size controllability from submicron to micron orders in the diameter. High non-conductivity can be kept by calcination even at higher temperature.