A method for evaluating the permanency of channels in an absorbent core, the method comprising the steps of: - providing an absorbent core (28), optionally in an absorbent article (20), wherein the absorbent layer comprises a least one channel (26), preferably at least two channels, extending in the longitudinal direction； - providing a liquid (40)； - pouring the liquid into the absorbent core so that the absorbent core absorbs at least some of the liquid； optionally squeezing of shaking the absorbent core； - cutting the absorbent core in the transversal direction； and - evaluating the presence or absence of channel bonds (27), and if channel bonds are present optionally evaluating the quality of the channel bonds.
