Abstract: An investigation has been made for the effect of extension deformation on the D-log E_R curve in the solarization region. With the effect, pf extension, the density increases under a given exposure. The micrographs have shown for examining the latensification by extension. The results are discussed in terms of the expected dislocation produced by deformation. The other micrographs have revealed the distribution of photolytic silver in the interior of the grains and in the undeformed solarization region.