From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: tuhs-bounces@minnie.tuhs.org X-Spam-Checker-Version: SpamAssassin 3.4.1 (2015-04-28) on inbox.vuxu.org X-Spam-Level: X-Spam-Status: No, score=-1.0 required=5.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,RCVD_IN_DNSWL_NONE autolearn=ham autolearn_force=no version=3.4.1 Received: from minnie.tuhs.org (minnie.tuhs.org [45.79.103.53]) by inbox.vuxu.org (OpenSMTPD) with ESMTP id 5269b1d3 for ; Fri, 10 Aug 2018 11:53:32 +0000 (UTC) Received: by minnie.tuhs.org (Postfix, from userid 112) id 4B70D9E2CC; Fri, 10 Aug 2018 21:53:31 +1000 (AEST) Received: from minnie.tuhs.org (localhost [127.0.0.1]) by minnie.tuhs.org (Postfix) with ESMTP id 394D39E27F; Fri, 10 Aug 2018 21:53:14 +1000 (AEST) Received: by minnie.tuhs.org (Postfix, from userid 112) id B2F309E27E; Fri, 10 Aug 2018 21:52:16 +1000 (AEST) Received: from avasout04.plus.net (avasout04.plus.net [212.159.14.19]) by minnie.tuhs.org (Postfix) with ESMTPS id 7DC9E9E27F for ; Fri, 10 Aug 2018 21:52:15 +1000 (AEST) Received: from mindy.dunnington.cx ([84.92.27.202]) by smtp with ESMTP id o5xif4jODI9T1o5xjfyemD; Fri, 10 Aug 2018 12:52:11 +0100 X-CM-Score: 0.00 X-CNFS-Analysis: v=2.3 cv=Z6vC4kZA c=1 sm=1 tr=0 a=W5Q3TbzFkoGugBkjAUuyvQ==:117 a=W5Q3TbzFkoGugBkjAUuyvQ==:17 a=IkcTkHD0fZMA:10 a=dapMudl6Dx4A:10 a=C3W4DVSWAAAA:8 a=q8_1dFiZIoBaqK-821kA:9 a=QEXdDO2ut3YA:10 a=MTb5RhiyNlVOlH7hbUQW:22 Received: from [172.17.2.96] (natpool1.dunnington.cx [84.92.27.201]) by mindy.dunnington.cx (8.12.9/8.12.9/8.12.9.08) with ESMTP id w7ABbqb4018337 for ; Fri, 10 Aug 2018 12:37:53 +0100 (BST) To: tuhs@minnie.tuhs.org References: <20180808123229.86FD5E465F@mailuser.nyi.internal> <6EBCF9E5-4600-42D6-9F83-3E2966140540@donhopkins.com> <20180808135106.D7441E4636@mailuser.nyi.internal> <5B6B2A78.7070303@texoma.net> <20180809141509.GA91112@accordion.employees.org> From: Pete Turnbull Message-ID: Date: Fri, 10 Aug 2018 12:37:45 +0100 User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:52.0) Gecko/20100101 Thunderbird/52.9.1 MIME-Version: 1.0 In-Reply-To: <20180809141509.GA91112@accordion.employees.org> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-GB Content-Transfer-Encoding: 7bit X-CMAE-Envelope: MS4wfCX9BtHMcWc6cME/XN3Kwyf+gDouBybFydrCw/vKuCH8Rp/FmKGMnv7o3SanbjOH/m7eH+098jWZ3Ig7keA638tJxo9usMCSF58M14R/7nq3iie5e4fl PRiEy6CBMCOTFwcCXLPSpTjwA8qlqozahPYWFWfzBTbRhbmVYjo16m4vfOL0n9KXp3rRvTOAZ1XRWA== Subject: Re: [TUHS] the distinct smell of light machine oil, was Re: TUHS Digest, Vol 33, Issue 7 X-BeenThere: tuhs@minnie.tuhs.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: The Unix Heritage Society mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: tuhs-bounces@minnie.tuhs.org Sender: "TUHS" On 09/08/2018 15:15, Derek Fawcus wrote: > On Thu, Aug 09, 2018 at 09:31:39AM -0400, Clem Cole wrote: >> Hmmrrph.... Youngsters... WD40 is silcon based. > > I didn't know that; never I checked the can; but yeah a distinctive smell... Ordinary WD40 is NOT silicone based (obNitPick: note the 'e': not silicon, which is a hard crystalline substance). There is a "specialist" silicone-based version but ordinary WD40 is hydrocarbon based, being a mixture of light paraffin (naptha to transpondians, ie the stuff that's used as a solvent or fuel) and a paraffin wax, as stated in the manufacturer's official MSDS document. The characteristic smell is largely from an aromatic hydrocarbon additive. >> Real "3 in One" oil >> (came in a small can) is light machine oil but you can still get it: > > Yup, useful on bike chains and oilstones (as in sharpening chisels and planes). And not much else, because like a lot of simple hydrocarbon oils developed half a century or more ago, it oxidises to a gummy substance. The Teletype manual definitely doesn't suggest 3-in-One oil and some sources suggest it's too thick anyway. The manual in front of me specifies two Western Electric part numbers for oil and grease. It's been discussed more than once on the Greenkeys list, and there's a useful page listing modern equivalents at Doug Jones' page: https://homepage.cs.uiowa.edu/~jones/pdp8/UI-8/ks7470oil.shtml -- Pete Pete Turnbull