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Bra wires undergo [[quality assurance]] testing, including the use of a push-pull [[load tester]] to verify the strength of the wire.
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Revision as of 22:13, 9 May 2009
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We will add more information about Underwire within these few weeks, include Production process, types and used.
Underwire image
I have removed the image of an underwire from the article until its copyright status is confirmed. I have notified the author, who will hopefully reply and provide licensing terms for the image. — LinguistAtLarge • Talk 14:55, 23 April 2009 (UTC)
Here are two more images with uncertain license status. Until their licenses can be confirmed, they will be here, not in the article. — LinguistAtLarge • Talk 00:48, 27 April 2009 (UTC)
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A wire cutting machineA wire cutting machine
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A motorized push pull load tester [1]A motorized push pull load tester [1]
1998 study
Seems to be a phantom. I can't figure out for the life of me where it was published. Neither Google Scholar nor PubMed have any relevant hits for a paper published in 1998 by Wightman. BBC News science reporting is atrocious as a general matter (see e.g. here) so I think I am going to remove this altogether until we can track down the original study. Calliopejen1 (talk) 03:03, 3 May 2009 (UTC)
- Note: this is referring to this text: A study published in 1998 showed that "regular use of push-up bras could cause bowel and breathing problems", but Wonderbra model Adriana Karembeu defended underwire push-up bras, as do manufacturers, who say the support their products provide help alleviate back pain. and this article: [1]. — LinguistAtLarge • Talk 08:12, 5 May 2009 (UTC)
Underwires and air travel
Seems like there's a bit of biased reporting going on in this section. Yes, occasionally they do set off metal detectors. But I have never experienced this problem in all my life, and neither have most women, judging by internet q&a sites like this. Can we find a good source indicating that this is not a regular occurrence? Calliopejen1 (talk) 04:00, 3 May 2009 (UTC)
Manufacture section
I have moved the "manufacture" section here, since it is all unsourced. If any bits of this can be sourced, those parts, along with the references, can be inserted into the article. — LinguistAtLarge • Talk 21:14, 9 May 2009 (UTC)
Bra underwires can be manufactured from metal or plastic. Wire design requirements include wire gauge, length, type of wire, and the color of the tip. Based on these requirements, a blueprint is usually created with computer-aided design software such as AutoCAD. Using the blueprint, a core size wire sample is prepared for customer approval.
Metal underwires are manufactured from high carbon, reeled, stainless steel, sometimes with a nylon coating. The wire is then pulled into a tailor-made cutting mold head in the cutting machine, which cuts and curves the wire. The wire is then heated to approximately 180 °C (356 °F) to 220 °C (428 °F) for 30 minutes to set the shape. The tips of the metal underwire are then often dipped in an abrasion-resistant nylon coating designed to cover their sharp edges. The wires are hung in the coating machine which pre-heats the tips, coats them with nylon powder, and applies heat to fuse the nylon coating with the metal wire. Decorative powder coating finishes are sometimes used to to create different colored tips, and in order to distinguish the bra wire position during assembly of the bra, the center front tip is normally a different color from the armhole tip.[2]
Plastic underwires are created using injection molding. After the mold is designed and milled, granular plastic is pre-heated, melted, and injected into the wire-shaped mold cavity through a gate and runner system. The mold remains cold so the finished plastic wire solidifies almost as soon as the mold is filled.
Bra wires undergo quality assurance testing, including the use of a push-pull load tester to verify the strength of the wire.
- ^ http://www.saiparadise.com/push-pull-load-tester.html
- ^ Device Technologies, Inc. "Electrostatic Technology Linear Powder Coating". GlobalSpec. Retrieved 2009-04-26.
Our powder coating method is a unique, reel-to-reel process. It applies thermoplastic resins such as nylon and polyethylene, or thermoset resins such as polyester and epoxy to linear metallic substrates such as wire, cable, stampings, or steel strip