We have analyzed the flux distributions of 13 planetary nuclei (NPN) spanning the full range of spectral classes known among central stars, except white dwarfs (see Table 1). We combined low-dispersion spectra from the IUE archives with absolute spectrophotometry scans taken by Dr. P. Massey at Kitt Peak with the Intensified Reticon Scanner (IRS) to obtain flux distributions covering the wavelength range λλ1150–7200 at ∼ 7 A resolution. In order to get the intrinsic stellar energy distributions, we first corrected the observed fluxes for interstellar extinction, and then subtracted out the nebular fluxes, which we estimated from the Hβ flux on the IRS observations and from the nebular temperature, density and helium ionic abundances. Finally, we fitted blackbody curves to the stellar continua.