Which pattern of enamel etching results in formation of honey comb appearance?

3 types of patten given in Sturdevant   Type 1 - dissolution of prism core-HONEY COMB APPEARANCE.   Type II – dissolution of prism periphery COBBLESTONE APPEARANCE.  Type III - less distinct pattern, mixture of 1 and 2.  Silverstone gave 5 types.  Type IV - pitted enamel as well as structures that look like unfinished puzzle,maps or network.  Type V - flat smooth surface.