抄録
This is the 2nd report, which is continued from the 1st report. In this report, we have studied on some etching solutions for the strain figures of steel and for ferrite. The former is macroetching and the latter is the micro-etching of ferrite Structure. As a result, we have established some methods of etching for the strain figures of steel, for A1 transformation band and for the crystals which constitute the ferrite structures of pure iron and hypo-eutectoid steel. Each crysatal of ferrite structure is etched in different colors and has lines which run parallel and have equal pitch. Some samples of etching are illustrated with photographs.
