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Non fading black ink

 
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rv10pro(at)gmail.com
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PostPosted: Sun Sep 03, 2017 4:06 pm    Post subject: Non fading black ink Reply with quote
John Cox
On Sep 3, 2017 15:40, "Janet Amtmann" <jgamtmann2(at)gmail.com (jgamtmann2(at)gmail.com)> wrote:
Quote:
Most black dies are really dark, dark blue.  True black, like india ink, consist of lamp black (carbon) in water or another carrier and is not a dye but forms a layer of carbon black on the substrate.  We used to make aircraft drawings on Vellum that did not fade.  Jurgen


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nuckolls.bob(at)aeroelect
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PostPosted: Wed Sep 06, 2017 9:51 am    Post subject: Non fading black ink Reply with quote
At 05:32 PM 9/3/2017, you wrote:
Quote:
Most black dies are really dark, dark blue. True black, like india ink, consist of lamp black (carbon) in water or another carrier and is not a dye but forms a layer of carbon black on the substrate. We used to make aircraft drawings on Vellum that did not fade. Jurgen

Yeah, just missed that. We'd graduated to plastic
lead on Mylar at Cessna by the time I started
there (1965). Wonder how those drawings look today.



Bob . . .

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