eugene walton Posted February 18, 2007 Report Posted February 18, 2007 how can you tell oil tempered swords that are in old or war time polish? I have a verry good sword(kanesada) no problem telling with this sword but the war swords are a nother matter Quote
Guest Simon Rowson Posted February 18, 2007 Report Posted February 18, 2007 Hi Eugene, Do your photos show a single blade? I'm a little confused as the temper line near the habaki is straight whilst that near the point is a zig-zag. Regarding oil tempering, a sure sign is a complete lack of nie, the larger martensite crystals that you only see in traditional water quenched blades. Also, most oil tempered blades show no hada, or grain, as they were mass produced from bars of steel. Simon Quote
eugene walton Posted February 18, 2007 Author Report Posted February 18, 2007 sorry, 2- blades, first 2 picks are a lesser qual. blade, the second 2 picks is what I hope is a better blade- it is signed kaneyoshi the hada is verry fine and the blade is koshi-zori, Quote
roninjje Posted February 20, 2007 Report Posted February 20, 2007 but they are both oil tempered. The second has a showa stamp, no? Quote
eugene walton Posted February 21, 2007 Author Report Posted February 21, 2007 the showa stamp shows non tradational, that just means "modern" steel not tamahagane was used in the mfg., the stamps were put into efect because some of the swords made with modern steel could not be told from "tradational" swords made from tamahagane.................................. this is from the book modern Japanese swords and swordsmiths Quote
roninjje Posted February 21, 2007 Report Posted February 21, 2007 that's true, but almost every sword with a showa stamp that I have seen was oil tempered, and withouy hada. Nice to see another Pittsburgher on the list Quote
eugene walton Posted February 21, 2007 Author Report Posted February 21, 2007 a lot of the better showa-to acquired false signatures, also the stamps were removed from maney better showa-to, and now have a verry diferent history than they should, I think the shape of a sword can tell part of the story, the truly massproduced swords seem to all have a standerd shape so the fitting could be made to the same standard, or.......... not Quote
eugene walton Posted February 22, 2007 Author Report Posted February 22, 2007 notice the difference in apper. in these two war time swords Quote
waynes Posted April 5, 2007 Report Posted April 5, 2007 I was wondering when did they start doing oil tempering as I have a blade that appears to have been done that way also. Quote
eugene walton Posted April 5, 2007 Author Report Posted April 5, 2007 murata-to were used in the 1890s useing oil temper,Murata Tsuneyoshi (1838-1921) started oil quenching, but it was ww2 that saw wide use of oil quenching, Quote
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