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Your Weekly Blog / Re: July 2018
« Last post by Fons Baerken on Today at 08:32:41 »


July 18, red and green tomatoes
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Your Weekly Blog / Re: July 2018
« Last post by Frank Fremerey on Today at 07:56:12 »
Spending some very intense days in a spiritual retirement in the nature, both physical and emotional. But still sometime to walk around. Excellent human connections are being made. 

I envy you. Have a great retreat!
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Lens Talk / 70-200VR-g1 and 70-200VR-g2 hood compatibility
« Last post by richardHaw on Today at 07:04:16 »
Sorry for making a thread about something so simple.
can anybody please confirm if the hood of the g2 will work on the g1? I currently have an old and cracked hood from my g2 that I would like to re-purpose for a project  :o :o :o
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What the Nerds Do / Re: benzene alternative
« Last post by richardHaw on Today at 04:28:37 »
i was looking for MSDS at the label and I didn't see anything this morning, odd... :o :o :o

the only thing they're willing to say is that it's n-hexane (60%) which isn't saying a lot. I guess this is still better than the real thing (benzene)  ::)
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What the Nerds Do / Re: benzene alternative
« Last post by Matthew Currie on Today at 04:21:02 »
Be careful with brake cleaners.  The Autozone stuff seems to be a new type, and is mostly acetone and heptane, but older brake cleaners contained very hazardous ingredients and were one of the nastiest things around, so it''s best to make sure what you're getting.  This is definitely not something you should fetch out of the back of the garage, but should get fresh.

Coleman fuel still looks pretty good too, as does Ronsonol.  The term "benzine" seems too variable to be trusted,  and although it often means naphtha, it doesn't always.

If in doubt about what's in something, you can Google "something MSDS" and it should cough up the official hazard warnings.
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What the Nerds Do / Re: benzene alternative
« Last post by richardHaw on Today at 03:01:08 »
Automotive aerosol brake cleaner contains heptane and toluene. 
I buy the non-chlorinated from my local Autozone https://www.autozone.com/brake-and-power-steering-fluid-additives/brake-cleaner/autozone-non-chlorinated-brake-cleaner/8130_0_0#
thanks, that looks handy for flushing old cameras  :o :o :o
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What the Nerds Do / Re: benzene alternative
« Last post by richardHaw on Today at 03:00:17 »
I notice you're referring to "benzene" rather than "benzine."  Here in the US, I don't know of any common sources for benzene, which is nasty stuff, but benzine with an "i" is different,  basically some variant of white gasoline, lighter fluid, Coleman fuel, etc., and pretty benign.  It's what fire eaters use.  Things might be different esewhere, but I think if I were looking in the US for a relatively non-hazardous petroleum solvent in quantities greater than a can of Ronsonol, I'd check out camping supply stores for stove fuel.  Toluene is a benzene with the "e" derivative, and seems to have many of the same risks.

PS.  It occurs to me to wonder whether "water white" kerosene might be an alternative too.  Some sewing machines (old Elnas come to mind) specify kerosene as a lubricant for the rotating shuttles, where even the thinnest oil is too oily. It certainly will mix with oil and thin it, though I don't know if it would be thin enough.  Here in the US, it can be hard to find kerosene that has not been adulterated, either with aromatics for lamps, or with dye to indicate the non-payment of highway taxes, but it can be found.

OK, it didn't occur to me to read the label and it said 60% n-hexane  :o :o :o

n-hexane is a hazardous chemical as well, i believe this is the same as benzine? damn, if only theres a safe nonpolar solvent available then i would buy it asap!
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Lens Talk / Re: the first 3 versions of the 80-200/2.8 AF
« Last post by richardHaw on Today at 00:49:41 »
my bad, it is for the AFS version  :o :o :o
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What the Nerds Do / Re: benzene alternative
« Last post by JCDowdy on Today at 00:04:42 »
Automotive aerosol brake cleaner contains heptane and toluene. 
I buy the non-chlorinated from my local Autozone https://www.autozone.com/brake-and-power-steering-fluid-additives/brake-cleaner/autozone-non-chlorinated-brake-cleaner/8130_0_0#
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Themes, Portfolio Series, PaW, or PaM / Re: [Theme]: Wide IR
« Last post by golunvolo on Today at 00:04:09 »
Thank you Akira. Flowing water was very rewarding. Amazing place in the nature. Will share some more in the near future. Im going to sleep now  :)
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