Comments on: Warm and Cool – Part 3 http://www.crashoctopus.com/2008/07/15/warm-and-cool-part-3/ An Ode to Art and Beer Sun, 11 Apr 2010 23:44:59 +0000 hourly 1 http://wordpress.org/?v=3.0.1 By: Meg http://www.crashoctopus.com/2008/07/15/warm-and-cool-part-3/comment-page-1/#comment-4313 Meg Tue, 05 Aug 2008 23:04:19 +0000 http://www.crashoctopus.com/?p=227#comment-4313 Mxali, The ultramarine has a lot of info on the tube. It says: Silicate of sodium and aluminum with sulphur (PB29). Do you know if that is natural or synthetic? Sounds sorta natural-ish... Mxali,

The ultramarine has a lot of info on the tube. It says:

Silicate of sodium and aluminum with sulphur (PB29).

Do you know if that is natural or synthetic? Sounds sorta natural-ish…

]]> By: Mxali http://www.crashoctopus.com/2008/07/15/warm-and-cool-part-3/comment-page-1/#comment-4302 Mxali Sat, 02 Aug 2008 16:19:37 +0000 http://www.crashoctopus.com/?p=227#comment-4302 Is it natural or synthetic Ultramarine? If it's natural, then the blue color is due to a S3- anion radical, which is somewhat unstable. Depending on the chemicals in the yellows, it's quite possible the ulramarine could react with something there and change some of the pigments. Is it natural or synthetic Ultramarine?
If it’s natural, then the blue color is due to a S3- anion radical, which is somewhat unstable.

Depending on the chemicals in the yellows, it’s quite possible the ulramarine could react with something there and change some of the pigments.

]]> By: Meg http://www.crashoctopus.com/2008/07/15/warm-and-cool-part-3/comment-page-1/#comment-4291 Meg Mon, 28 Jul 2008 01:25:53 +0000 http://www.crashoctopus.com/?p=227#comment-4291 Lisa, good thought. For this experiment, I used tubes that only had single pigments listed, but I'm not sure about the purity of those pigments... Lisa, good thought. For this experiment, I used tubes that only had single pigments listed, but I’m not sure about the purity of those pigments…

]]> By: Lisa B. http://www.crashoctopus.com/2008/07/15/warm-and-cool-part-3/comment-page-1/#comment-4282 Lisa B. Thu, 17 Jul 2008 17:04:45 +0000 http://www.crashoctopus.com/?p=227#comment-4282 Are you using single pigment paints for this experiment? If more than one is inside, it would account for the muddiness. Pure Ultramarine is PB29 (Pigment Blue 29). On my monitor, the two cool colors look a lot like the cool blue with the warm yellow! Are you using single pigment paints for this experiment? If more than one is inside, it would account for the muddiness. Pure Ultramarine is PB29 (Pigment Blue 29). On my monitor, the two cool colors look a lot like the cool blue with the warm yellow!

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