tag:blogger.com,1999:blog-2891643331061427318.post5555705039350453667..comments2024-03-23T08:53:29.282-07:00Comments on The Watercolour Log: Ultramarine Blue PB29 (Pigment Blue 29)Peter Wardhttp://www.blogger.com/profile/07451951778074071828noreply@blogger.comBlogger7125tag:blogger.com,1999:blog-2891643331061427318.post-64842053327475358352018-08-30T03:31:07.322-07:002018-08-30T03:31:07.322-07:00Thanks BB. Sorry I just picked this up.Thanks BB. Sorry I just picked this up.Peter Wardhttps://www.blogger.com/profile/07451951778074071828noreply@blogger.comtag:blogger.com,1999:blog-2891643331061427318.post-61815488749485622742018-08-12T09:49:32.527-07:002018-08-12T09:49:32.527-07:00Those 5 digit code numbers are specific to the com...Those 5 digit code numbers are specific to the company whose chart that is, Habich. You've just cropped their company name off the bottom of the chart. The numbers have no relevance to ultramarine pigments produced by any other manufacturer, and there are a lot of them as ultramarines are used in products from laundry to plastics to make-up to paints and come in different grades of quality to suit each application.<br /><br />The CI number for ultramarine varies only for the green shade, I'm not sure why, but at all other times it is CI 77013.<br />Ultramarine Green is PG55 CI 77013, Ultramarine Blue PB29 CI 77007, Ultramarine Violet PV15 CI 77007, Ultramarine Pink PR259 CI 77007. You will also find other types of codes for the chemical such as the CAS code(s) and an EINECS number. Here is a link to an MSDS for another manufacturer who uses 4 digit codes for each of the different blue shades that come out of their kiln: https://llumapigments.com/uploads/Docs/Lluma-MSDS.pdf <br /><br />"Synthetic ultramarine is made by mixing anhydrous sodium sulfate or sodium carbonate with charcoal, clay, rosin, silica, sulfur, and slowly calcined in a reducing atmosphere to 1,380º F (750º C). The various shades of blues, greens, reds and violets are produced by varying heating times and temperatures, mixture proportions, and/or other modifiers. For example Ultramarine Green is the "first product of ignition in the manufacture of Ultramarine blue by the indirect process" (Ref Color Index 3rd Ed., V.4, Inorganic colorants CI 77013).Bendy Beautyhttps://www.blogger.com/profile/00487647318047649215noreply@blogger.comtag:blogger.com,1999:blog-2891643331061427318.post-54977808845608944492016-11-22T02:41:23.720-08:002016-11-22T02:41:23.720-08:00Did you see the piece (with chart) by Zvonimir abo...Did you see the piece (with chart) by Zvonimir about ultramarine variations?Peter Wardhttps://www.blogger.com/profile/07451951778074071828noreply@blogger.comtag:blogger.com,1999:blog-2891643331061427318.post-55038560954331593812016-11-21T05:58:56.105-08:002016-11-21T05:58:56.105-08:00Great site Peter, and me too, about being very muc...Great site Peter, and me too, about being very much into pigments <br />I heard somewhere (in relation to DS Ultramarine French version) that ultramarines labeled French are green shade, but I can't see it. What I do see however is that the French or finest versions have a much finer pigment particle size, therefore are staining.<br /><br />DS Ultramarine ordinary is a rich deeper mid red shade that has a strong and unique textural type of heavy granulation. It is nice bright on cool white papers, but darkens and dulls significantly on very warm yellowish papers such as Waterford trad, ( think PB60 Indianthone-ish)<br /><br />Holbein's deep is is also a rich mid red shade, but with only a very slight, smooth and rather fine granular quality. The Light is if anything more saturated, and a very bright, very red shade that has an extremely fine pigment particle size. Holbein's deep and light versions equate to ordinary and French/ finest in other brands, and are seried all accordingly. The HWC ultramarines are are both gorgeous colours, and also the least granulating of any ultramarines I know. The deep is available in 60ml tubes, whilst the light is only available in<br />15ml tubes.<br /><br />Terry<br />Terry 904https://www.blogger.com/profile/14724878577135653638noreply@blogger.comtag:blogger.com,1999:blog-2891643331061427318.post-31552422696557435922016-04-20T12:57:35.978-07:002016-04-20T12:57:35.978-07:00Thanks Polly. I find colours (pigments) a fascinat...Thanks Polly. I find colours (pigments) a fascinating subject but most artists don't get too involved. Many well-known artists talk about colours taking whatever the makers say about them without looking beyond the colour name to the pigment data. Peter Wardhttps://www.blogger.com/profile/07451951778074071828noreply@blogger.comtag:blogger.com,1999:blog-2891643331061427318.post-37915946889979005812016-04-20T10:09:46.274-07:002016-04-20T10:09:46.274-07:00This comment has been removed by the author.Peter Wardhttps://www.blogger.com/profile/07451951778074071828noreply@blogger.comtag:blogger.com,1999:blog-2891643331061427318.post-74889342015567688112016-04-19T12:06:20.198-07:002016-04-19T12:06:20.198-07:00Really interesting information. I love this colou...Really interesting information. I love this colour, probably the one I use most, and am very interested in colour in general.Polly Birchallhttps://www.blogger.com/profile/18071252070928856360noreply@blogger.com