Evolution of the maximum momentum p_max (a) and the normalized diffusion length ${\overline{x}}_{\mathrm{pm}}$ (b) for particles with the maximum momentum in the test-particle acceleration scenario with Kolmogorov diffusion. Different colours show three of our models of SNRs. Line types represent the time-limited (dashed lines), loss-limited (dot-dashed lines) p_max, and the minimum of the two (solid lines). Lines for ${\overline{x}}_{\mathrm{pm}}$ correspond to the solid lines in the plot for the maximum momenta. p_max, rad < p_max, age from t = 1.3 kyr for the blue and t = 2.3 kyr for the green solid lines.