Parameters of the blaze function as a function of the order r, shown either as discrete values α_r, δ_r, ϵ_r, θ_r, γ_r, or as continuous polynomials α(r), δ(r), ϵ(r), θ(r), γ(r). We show a comparison of two rectification methods: resimplex1 on a set of 10 spectra (black), resimplex1 on a different set of 10 spectra (gray), resimplex2 (blue), resimplex2 with splitting at orders 16, 28, 48 (red). We also show a preliminary fit of black values (green), which served as a starting for resimplex2. The variability of discrete values is substantial, especially for orders r ≳ 50 (Paschen series), but this is suppressed when using polynomials.