{"id":1277,"date":"2012-02-04T23:23:16","date_gmt":"2012-02-04T23:23:16","guid":{"rendered":"http:\/\/sterlingsculptures.com\/wp\/?p=1277"},"modified":"2012-02-06T05:40:16","modified_gmt":"2012-02-06T05:40:16","slug":"making-shibuichi-part-2","status":"publish","type":"post","link":"http:\/\/sterlingsculptures.com\/wp\/?p=1277","title":{"rendered":"Making Shibuichi part 2"},"content":{"rendered":"

I spent today rolling out my three shibuichi ingots into useable sheet.<\/p>\n

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\nHere’s a picture of my Durston rolling mill.<\/p>\n

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\nAbove, I’m pickling the cast ingots in Sparex pickle. “Pickling” dissolves the dark oxides formed when the molten metal hits oxygen in the atmosphere. I use a small crockpot to keep the liquid hot, so it works faster. Three to four minutes per pickling cycle ought to do it.<\/p>\n

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\nHere’s the small 20% shibuichi ingot after pickling, and a quick brushing of the surface. Sorry for the lousy focus…my bad.<\/p>\n

\"\"<\/a>Here is the ingot after the first round of rolling, and after I annealed it. Annealing is heating the shibuichi to glowing red – this softens the hardened metal. Shibuichi “work hardens” quite easily when being rolled (gets hard and brittle), and if I don’t anneal it pretty often, it will crack and ruin all my hard work. I’ll pickle the ingot again, followed by brushing to remove the dark oxides.<\/p>\n

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\nHere’s the ingot emerging from the rolling mill. Notice how nice and smooth the rough cast surface is now.<\/p>\n

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\nAnd above, the ingot has had several rounds of rolling, annealing,and pickling. Notice the crack developing at the top. Hopefully this crack won’t get too much worse as I continue rolling, lengthening and thinning the shibuichi. I’ll just have to take the crack into consideration when designing. I can probably get two to three small pendants from this piece.<\/p>\n

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\nAnd here is the finished 20% shibuichi sheet. Note the arrow to remind myself of the crack…<\/p>\n

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\nAbove, here is a magically computer-edited series of one of the other ingots. The red rectangle is a tracing of the original ingot, and each of the others is after a round of rolling, annealing,and pickling. Notice how each time lengthens the shibuichi sheet (thinning the sheet as it goes). Since the rolling mill tends to bend the sheet as it exits, I also forge the sheet flat on my anvil after most of the rounds of rolling. That explains the textured surface you can see on the three sheets on the right.<\/p>\n

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\nI noticed something interesting happening with the shibuichi I haven’t noticed before. The sheet on the right is how shibuichi appears after freshly brushing the surface. The sheet on the left is noticeably silver colored after pickling – I think this is “depletion gilding”. Depletion gilding is a jewelry technique where you can build up a pure silver surface in a silver alloy containing copper, by repeatedly burning the copper at the surface into an oxide layer, then pickling, which dissolves away the copper oxides, but leaves the silver. Just a cool thing I’ve never seen before, probably because I didn’t know enough to notice it!<\/p>\n

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\nAnd, here are all three shibuichi sheets, completed and ready to use.<\/p>\n","protected":false},"excerpt":{"rendered":"

I spent today rolling out my three shibuichi ingots into useable sheet. Here’s a picture of my Durston rolling mill. Above, I’m pickling the cast ingots in Sparex pickle. “Pickling” dissolves the dark oxides formed when the molten metal hits … Continue reading →<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"spay_email":"","jetpack_publicize_message":"","jetpack_is_tweetstorm":false,"jetpack_publicize_feature_enabled":true},"categories":[5],"tags":[19,3,7,26],"jetpack_featured_media_url":"","jetpack_publicize_connections":[],"jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p6qLAy-kB","jetpack-related-posts":[{"id":1266,"url":"http:\/\/sterlingsculptures.com\/wp\/?p=1266","url_meta":{"origin":1277,"position":0},"title":"Making Shibuichi part 1","date":"February 3, 2012","format":false,"excerpt":"Since I've spent the last week working on my web site format change, my wife is making me get serious about starting a new knife, so I have to make some shibuichi ingots for the knife handle scales. Shibuichi is an ancient Japanese precious bronze art alloy, typically made of\u2026","rel":"","context":"In "Engraved Knife"","img":{"alt_text":"","src":"https:\/\/i0.wp.com\/sterlingsculptures.com\/wp\/wp-content\/uploads\/2012\/02\/Shibuichi_Ingots_5.jpg?resize=350%2C200","width":350,"height":200},"classes":[]},{"id":1472,"url":"http:\/\/sterlingsculptures.com\/wp\/?p=1472","url_meta":{"origin":1277,"position":1},"title":"Ants Miseretto part 9 – Risk Reduction","date":"February 29, 2012","format":false,"excerpt":"Now that my \"canvas\" is completed, it's time to turn my efforts to the design phase of the project. \u00a0I've spent an awful lot of time making the knife, and I'm concerned about inlaying the gold ants in the shibuichi. \u00a0I've inlaid one in nickel before, but not shibuichi, so,\u2026","rel":"","context":"In "Carving"","img":{"alt_text":"","src":"https:\/\/i1.wp.com\/sterlingsculptures.com\/wp\/wp-content\/uploads\/2012\/02\/Shibuichi_Pendant_16.jpg?resize=350%2C200","width":350,"height":200},"classes":[]},{"id":2621,"url":"http:\/\/sterlingsculptures.com\/wp\/?p=2621","url_meta":{"origin":1277,"position":2},"title":"Dried Sardine Scalpel and Reliquary – Part 5","date":"February 6, 2014","format":false,"excerpt":"Above, I've transferred my detailed pattern to the sardines on the lid, ready to begin detailing. I've begun detailing by engraving the eye, gill and fin details just like on the shibuichi scalpel scales. Continuing with the detailing by using a flat graver to lower the areas behind the engraved\u2026","rel":"","context":"In "Carving"","img":{"alt_text":"Dried_Anchovy_Scalpel_97","src":"https:\/\/i2.wp.com\/sterlingsculptures.com\/wp\/wp-content\/uploads\/2014\/02\/Dried_Anchovy_Scalpel_97.jpg?resize=350%2C200","width":350,"height":200},"classes":[]},{"id":2455,"url":"http:\/\/sterlingsculptures.com\/wp\/?p=2455","url_meta":{"origin":1277,"position":3},"title":"Clockwork Trilobite – Part 2","date":"November 24, 2013","format":false,"excerpt":"Today was just a lot of sawing.\u00a0 A lot\u2026I had forgotten how gummy and resisting sterling silver could be, especially in thicker pieces.\u00a0 Now I remember why I much prefer sawing, engraving and carving in steel\u2026 Above are the two trilobite pieces sawn from my two silver plates.\u00a0 On the\u2026","rel":"","context":"In "Carving"","img":{"alt_text":"","src":"https:\/\/i2.wp.com\/sterlingsculptures.com\/wp\/wp-content\/uploads\/2013\/11\/Toadsticker_Shiv_Box.jpg?resize=350%2C200","width":350,"height":200},"classes":[]},{"id":1408,"url":"http:\/\/sterlingsculptures.com\/wp\/?p=1408","url_meta":{"origin":1277,"position":4},"title":"Ants Miseretto part 5","date":"February 19, 2012","format":false,"excerpt":"Not much happening here, but the blade has soaked in vinegar all night to dissolve the scale created during the blade forging and hot rolling during the creation of the original steel bar. And, above, the blade after using a ScotchBrite\u2122 abrasive pad to remove the dark oxide left from\u2026","rel":"","context":"In "Engraved Knife"","img":{"alt_text":"","src":"https:\/\/i2.wp.com\/sterlingsculptures.com\/wp\/wp-content\/uploads\/2012\/02\/Ants_Miseretto_29.jpg?resize=350%2C200","width":350,"height":200},"classes":[]},{"id":3238,"url":"http:\/\/sterlingsculptures.com\/wp\/?p=3238","url_meta":{"origin":1277,"position":5},"title":"William Henry “Engraved Longhorn Beetle Knife” Part 2","date":"July 3, 2014","format":false,"excerpt":"Installing the Shibuichi Pocket Inlay Today is all about getting the shibuichi inlay into the stainless steel scales. \u00a0As far as I'm concerned, this is the make it or break it phase. \u00a0If I should fail to get the inlay properly in place, that is probably the end of this\u2026","rel":"","context":"In "Carving"","img":{"alt_text":"","src":"https:\/\/i2.wp.com\/sterlingsculptures.com\/wp\/wp-content\/uploads\/2014\/07\/William_Henry_B10_Longhorn_Beetle_15.jpg?resize=350%2C200","width":350,"height":200},"classes":[]}],"_links":{"self":[{"href":"http:\/\/sterlingsculptures.com\/wp\/index.php?rest_route=\/wp\/v2\/posts\/1277"}],"collection":[{"href":"http:\/\/sterlingsculptures.com\/wp\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/sterlingsculptures.com\/wp\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/sterlingsculptures.com\/wp\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/sterlingsculptures.com\/wp\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1277"}],"version-history":[{"count":6,"href":"http:\/\/sterlingsculptures.com\/wp\/index.php?rest_route=\/wp\/v2\/posts\/1277\/revisions"}],"predecessor-version":[{"id":1297,"href":"http:\/\/sterlingsculptures.com\/wp\/index.php?rest_route=\/wp\/v2\/posts\/1277\/revisions\/1297"}],"wp:attachment":[{"href":"http:\/\/sterlingsculptures.com\/wp\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1277"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/sterlingsculptures.com\/wp\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1277"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/sterlingsculptures.com\/wp\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1277"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}