From mboxrd@z Thu Jan 1 00:00:00 1970 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on inbox.vuxu.org X-Spam-Level: X-Spam-Status: No, score=-1.0 required=5.0 tests=MAILING_LIST_MULTI, T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.4 Received: (qmail 16985 invoked from network); 2 Jul 2022 05:36:08 -0000 Received: from minnie.tuhs.org (50.116.15.146) by inbox.vuxu.org with ESMTPUTF8; 2 Jul 2022 05:36:08 -0000 Received: from minnie.tuhs.org (localhost [IPv6:::1]) by minnie.tuhs.org (Postfix) with ESMTP id 1577D40C7F; Sat, 2 Jul 2022 15:35:37 +1000 (AEST) Received: from smtp03.aussiebb.com.au (smtp03.aussiebb.com.au [121.200.0.94]) by minnie.tuhs.org (Postfix) with ESMTPS id 7221540C27 for ; Sat, 2 Jul 2022 15:35:33 +1000 (AEST) Received: from localhost (localhost [127.0.0.1]) by smtp03.aussiebb.com.au (Postfix) with ESMTP id 64E1C1A017C for ; Sat, 2 Jul 2022 15:35:30 +1000 (AEST) X-Virus-Scanned: Debian amavisd-new at smtp03.aussiebb.com.au Received: from smtp03.aussiebb.com.au ([127.0.0.1]) by localhost (smtp03.aussiebb.com.au [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id G1q7nkMnY8vb for ; Sat, 2 Jul 2022 15:35:30 +1000 (AEST) Received: by smtp03.aussiebb.com.au (Postfix, from userid 119) id 518201A0193; Sat, 2 Jul 2022 15:35:30 +1000 (AEST) Received: from eureka.lemis.com (121-200-11-253.79c80b.mel.nbn.aussiebb.net [121.200.11.253]) by smtp03.aussiebb.com.au (Postfix) with ESMTP id 486191A0050; Sat, 2 Jul 2022 15:35:29 +1000 (AEST) Received: by eureka.lemis.com (Postfix, from userid 1004) id 9E9D72635BA; Sat, 2 Jul 2022 15:35:28 +1000 (AEST) Date: Sat, 2 Jul 2022 15:35:28 +1000 From: Greg 'groggy' Lehey To: Adam Thornton Message-ID: <20220702053528.GF84351@eureka.lemis.com> References: <180245D1-0DCD-4C2C-A26A-EF68578FD548@canb.auug.org.au> <20220701004118.GA22338@tau1.ceti.pl> <67e0d22c-e70b-e9bb-4614-eb1426bf2bd0@gmail.com> <20220702000828.GB32390@eureka.lemis.com> <20220702012641.GA84351@eureka.lemis.com> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="Y1L3PTX8QE8cb2T+" Content-Disposition: inline In-Reply-To: Organization: LEMIS, 29 Stones Road, Dereel, VIC, Australia Phone: +61-3-5309-0418 Mobile: +61-490-494-038. 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WWW-Home-Page: http://www.lemis.com/grog X-PGP-Fingerprint: 9A1B 8202 BCCE B846 F92F 09AC 22E6 F290 507A 4223 User-Agent: Mutt/1.6.1 (2016-04-27) Message-ID-Hash: XILU7UDLIHIXDPQDLYBYUJYAR5MB2GM6 X-Message-ID-Hash: XILU7UDLIHIXDPQDLYBYUJYAR5MB2GM6 X-MailFrom: grog@lemis.com X-Mailman-Rule-Misses: dmarc-mitigation; no-senders; approved; emergency; loop; banned-address; member-moderation; nonmember-moderation; administrivia; implicit-dest; max-recipients; max-size; news-moderation; no-subject; digests; suspicious-header CC: COFF X-Mailman-Version: 3.3.6b1 Precedence: list Subject: [COFF] Re: Safelights (was: "9 skills our grandkids won't have") List-Id: Computer Old Farts Forum Archived-At: List-Archive: List-Help: List-Owner: List-Post: List-Subscribe: List-Unsubscribe: --Y1L3PTX8QE8cb2T+ Content-Type: text/plain; charset=us-ascii Content-Disposition: inline On Friday, 1 July 2022 at 22:21:49 -0700, Adam Thornton wrote: >> On Jul 1, 2022, at 6:26 PM, Greg 'groggy' Lehey wrote: >> >> On Friday, 1 July 2022 at 17:57:35 -0700, Adam Thornton wrote: >>> On Jul 1, 2022, at 5:08 PM, Greg 'groggy' Lehey wrote: >>>> On Friday, 1 July 2022 at 20:12:44 +0200, Harald Arnesen wrote: >>>>> Except that we didn't use red light in our darkrooms at all, at least >>>>> not from the 1970s and on. ... >>>> >>>> Correct. I started darkroom work in 1964, and from the beginning we >>>> used amber safelights. I don't think red safelights have been used >>>> since long before that. >>> >>> When I learned film photography in the mid 1980s the darkroom had >>> red lights. Of course it was a very old darkroom in a middle school, >>> so I'm sure that _adequate_ darkrooms had better equipment. >> >> Hmm. Any idea how old the equipment is? I suppose you wouldn't >> expect people to replace existing, functional equipment without good >> reason. > > No idea at all how old it was. I mean, a) I was a kid, and b) it > was the first darkroom I'd ever seen so I had no basis of comparison. > I'm sure it was at least one and maybe more generations of > hand-me-down by the time I got to use it. But, I mean, "good enough > for middle school kids, and we got it for free" was probably good > enough, right? Yes, of course. I was just curious. But in the meantime many have reported using red safelights, so the answer's not that relevant. I dug back into my records, and found that I bought an OB (amber) and 3 (dark green, for panchro) safelight filter for the school darkroom on 19 May 1965. No mention of a red filter yet. And https://www.kodak.com/content/products-brochures/Film/Safelight-Recommendations.pdf agrees with me that amber is the most appropriate colour for black and white print paper. I wonder why red safelights were so prevalent. Greg -- Sent from my desktop computer. Finger grog@lemis.com for PGP public key. See complete headers for address and phone numbers. This message is digitally signed. 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