  We present the results of afterpulse measurements performed as qualification
test for 473 inner detector photomultipliers of the Double Chooz experiment.
The measurements include the determination of a total afterpulse occurrence
probability as well as an average time distribution of these pulses.
Additionally, more detailed measurements with different light sources and
simultaneous charge and timing measurements were performed with a few
photomultipliers to allow a more detailed understanding of the effect. The
results of all measurements are presented and discussed.
