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   🇺🇦 haxadecimal 🚫👑 (brouhaha@mastodon.social)'s status on Saturday, 08-Aug-2026 14:39:50 JST 🇺🇦 haxadecimal 🚫👑

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   • Imogen
   • Kilroy_Was_Here

   @HopelessDemigod @kilroy_was_here
   And of course the replacements for that are quite expensive

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     Steve's Place (steter@mastodon.stevesworld.co)'s status on Saturday, 08-Aug-2026 14:39:50 JST Steve's Place

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     • Imogen
     • Kilroy_Was_Here

     @brouhaha @HopelessDemigod @kilroy_was_here I've been doing very little electronics work, but some PC projects are awaiting my attention. Glad to hear there are some replacements.

     99% alcohol might work for removing tobacco tar. Cheaper, for sure.

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     Imogen (hopelessdemigod@mstdn.social)'s status on Saturday, 08-Aug-2026 14:39:51 JST Imogen

     in reply to

     • Kilroy_Was_Here

     @brouhaha @kilroy_was_here

     I used to wash dirty motherboards and computer cased in TCE as part of servicing them when they had cigarette residue on them. Of course you can’t purchase TCE anymore.

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     🇺🇦 haxadecimal 🚫👑 (brouhaha@mastodon.social)'s status on Saturday, 08-Aug-2026 14:39:52 JST 🇺🇦 haxadecimal 🚫👑

     in reply to

     • Imogen
     • Kilroy_Was_Here

     @HopelessDemigod @kilroy_was_here
     The old formilatikns were PFCs and were taken off the market years ago. The more recent stuff were segregated hydrofluoroether (HFE) compounds or fluoroketones (FK), which have much lower global warming potential. 3M got out of that market, but several other companies, like Best Technologies, still make them, and offer a variety of products that can match the characteristics of specific 3M products.

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     🇺🇦 haxadecimal 🚫👑 (brouhaha@mastodon.social)'s status on Saturday, 08-Aug-2026 14:39:52 JST 🇺🇦 haxadecimal 🚫👑

     in reply to

     • Imogen
     • Kilroy_Was_Here

     @HopelessDemigod @kilroy_was_here
     Novec 7300 was good for immersion cooling of electronics, and there are third-party equivalents to them. The cost was over $400 per liter. I'm told that the equivalents from other vendors are roughly half that price.

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     🇺🇦 haxadecimal 🚫👑 (brouhaha@mastodon.social)'s status on Saturday, 08-Aug-2026 14:39:52 JST 🇺🇦 haxadecimal 🚫👑

     in reply to

     • Imogen
     • Kilroy_Was_Here

     @HopelessDemigod @kilroy_was_here
     Mineral oil is used for heat transfer in commercial processes, but not usually for immersion cooling of electronics, though hobbyists have done it. Pricing for industrial mineral oil in bulk is under $1 per liter. The main drawback is that the viscosity of mineral oil is about 50 to 100 times higher.

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     Imogen (hopelessdemigod@mstdn.social)'s status on Saturday, 08-Aug-2026 14:39:53 JST Imogen

     in reply to

     • Kilroy_Was_Here

     @kilroy_was_here

     I learned this evening that 3M discontinued production last year.

     I should have purchased some for cleaning radio equipment.

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     Kilroy_Was_Here (kilroy_was_here@dobbs.town)'s status on Saturday, 08-Aug-2026 14:39:55 JST Kilroy_Was_Here

     in reply to

     • Imogen

     @HopelessDemigod We used Novec degreaser at the electronics plant. Big heated tank for dipping electronic assemblies in to get absolutely all the flux off.

     Folks would come in and dip greasy car parts in the tank. Weren't supposed to do it, but it happened. They'd come out squeaky clean.

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     Imogen (hopelessdemigod@mstdn.social)'s status on Saturday, 08-Aug-2026 14:39:56 JST Imogen

     3M Novec 649 cooling liquid.

     https://youtu.be/ysc8qycFd44