Change of particle pressure and fractions obtained in correspondence to the space-time coordinates explicitly marked in the left panel of Fig. 9 and corresponding to P/P_sim = 0.94 (upper row) and P/P_sim = 1.03 (lower row). The bar plots in blue (left) give the difference between the equilibrium pressure computed in post-processing and in the simulation, , where , and P_tot refers to the total pressure. The bar plots in red (centre) show the difference between the particle fractions computed in post-processing and the ones from the simulation, , where , and e (μ) refers to the net electron (muon) fractions. The colour-coded plots (right) show P_b of BLh as a function of temperature and proton fraction for the same points. The density ρ is fixed to the value obtained in the simulation, that is, ρ = 4.3 × 10¹⁴ g cm⁻³ (upper row) and ρ = 1.55 ⋅ 10¹⁴ g cm⁻³ (lower row). The black star and the diamond mark are the values from the simulation (before post-processing) and at equilibrium (after post-processing), respectively.