Hira-ganna Japanese Smoothing Plane By Keizaburo - 70mm ③
Smith name: Uchihashi Keisuke
Steel: Super White Steel
Jigane(Iron part of the blade): Wrought iron(Kamaji)
Blade Width: 71mm
Blade length: 116mm
Blade thickness: The blade near the bevel(about 6.05mm)，Top of Blade（about 7.85mm）
Blade Weight: 372g
Blade Angles: 27°
Chip Breaker Width: 63mm
Dai manufacture: Based on my speculation, the dai was crafted by Nimura
Dai size(length, width, thickness): 290mm 90mm 37mm
Total weight: 1217g
Accessories: -
Year of production: 2022
Additional Information: Unused, in brand new condition.The uragane (Chip Breaker ) is also hand-made by the Keizaburo.
According to online documentation on Super White Paper steel (Super Shirogami), it is melted under a high-purity vacuum process to drastically minimize impurities, yielding a plane that hones with remarkable ease. During final stropping and honing (shiage-togi), the burr (wire edge) releases cleanly and effortlessly. This blade is exceptionally well-suited for ultra-thin shavings (usu-kezuri) as well as pristine finish planing.
Keizaburo is one of the few contemporary blacksmiths who can truly master Shirogami-grade steels. As unalloyed high-carbon steel, White Paper steel has an unforgivingly narrow forging and heat-treatment window; judging the steel's heat calls for extreme vigilance and labor-intensive care—a challenge he executes with seasoned precision.
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