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Technical Support Central
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 Wednesday, June 27, 2007
Color Compromises
 I’m continuing my experimentation with selecting a palette of colors that have the fewest hues and the widest range. I regularly employ a spectrophotometer that measures the relative intensities of light in different parts of a spectrum, but all the color measuring in the world will not substitute for actual mixing. I can tell you about the subtle bias of a color and how it leans toward warm or cool, but for all practical purposes, mixing is still the only way to know how any paint will behave when combined with other hues. Spectral measurements verify and will provide an extension of what the eye can see by revealing the amount of reflectance at regularly spaced intervals over the visible range of the electromagnetic spectrum. While telling me a lot, it still doesn’t provide enough data for me to select an ideal palette. The set I selected this time was muted primaries supplemented by high chroma colors that extend the range of hues when the muted primaries run to the limit of chroma that they can deliver. My first experiment was with cadmium yellow deep, cadmium yellow, ultramarine blue and iron oxide red. (See the Color Wheel Diagram explanation in a separate blog entry.) Regarding secondary color mixtures, this palette makes nice bright orange and red-orange hues, very low chroma greens and muddy purples. Iron oxide red is a very useful color but is no substitute for cadmium red. Iron oxide red is just a muted form of an earthy orange. Mixing red oxide with yellow provides lots of orange hues. Combining red oxide with blue activates the color complement rule so that a lovely group of warm or cool grays is achievable. These grays are fantastic—well worth the effort in keeping iron oxide red as part of the palette. Finally, ultramarine blue mixed with cadmium yellow provides a very low chroma green, much like mixtures of cadmium yellow and black. That is when I thought of incorporating both cadmium red to help boost the range of the warm yellow and orange hues as well as phthalocyanine green to increase the intensity of green hues. I’m happy to say that the addition of the two worked rather well. All phthalocyanine colors are very strong. Combining phthalo green with the cadmium yellow/ultramarine blue boosts the chroma of the yellow/blue mixture. Conversely, the muted green mixture softens the harshness of straight phthalocyanine green, thus making it an ideal color for a variety of landscape situations. Adding yellow, orange or blue warmed and cooled the green mixture very nicely. The addition of cadmium red provided a respectable violet, since iron oxide red and ultramarine blue made a weak purple. Adding cadmium red also expanded the range of orange hues (when mixed with cadmium yellow). I suppose I could drop the cadmium yellow deep and settle for mixed orange hues. The color is fairly redundant, if the proper selection of warm primaries is determined. I’ll use this palette on a few paintings before I decide to settle down and learn its intricacies. I will miss my earth colors, but I can hold them to the side and introduce them as guest colors when needed. I will relish the wide range of grays that can be made with ultramarine blue and iron oxide red. Next time, I’ll discuss a variation of this palette. Palettes
6/27/2007 1:10:21 PM (Eastern Daylight Time, UTC-04:00)
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 Monday, June 11, 2007
Plein Air Painting and Golf
I've come to realize that for me, golf and plein air painting have a symbiotic relationship. A soft-pack golf bag made to take clubs on airplanes serves as a suitable container for my clubs, as well as a tripod, hardboard panels and assorted other items needed for plein air painting. It creates the heaviest set of golf clubs checked onto a flight, but I figure if I don’t exceed my 50 lbs. limit, it should be fine. Since I don’t take a full set of drivers and wedges on trips, the initial weight of my set of clubs is less than that carried by a typical player. For this trip, my total bag weight was 39 lbs. along with my panels and tripod. So while golfing and painting during a recent vacation in California, I got a chance to experiment with a limited palette that I’ve been anxious to try. (No, I did not golf and paint at the same time. This combination slows down the game too much and really upsets the course officials.) I must credit this palette of colors to Scott Gellatly, Technical Support Representative at Gamblin Artists Colors Co ( http://www.scottgellatly.com/). His paintings are amazing. While the palette I’m about to describe isn’t his exclusive palette, Gellatly and I discussed it as an alternate limited palette during a past visit he made to Washington. It’s a fairly simple three-color primary palette composed of Indian Yellow, Quinacridone Violet and Prussian Blue. (You can substitute Phthalocyanine Blue for Prussian Blue without any drastic modifications.) Each color alone and the combination of colors to create secondary hues provide a fairly muted palette. Each of the primary colors is somewhat low in chroma and value. Adding a bit of white helps to bring out the full extent of their character. I liked the range of greens made with Prussian Blue and Indian Yellow. The violets are fine made of varying combinations of magenta and blue. Orange hues are fiery and a good start for making earthy browns when mixed with a bit of blue and black. Adding white to the secondary green mixture doesn’t create acceptable green hues for landscape painting. Titanium white turns mixed greens into pale, minty hues that are not within a range I like for landscape foliage. Interestingly, Indian Yellow combined with titanium white makes the yellow appear to be sullied with a blue grey cast. This is one case where the cool bluishness of titanium dioxide works against the combination of yellow pigments used in Indian Yellow. This effect is partly due to Indian Yellow being transparent and susceptible to the overpowering influence of a strong, opaque, cool pigment like titanium white. This mixture might look better with a less powerful, semi-transparent mixing white. As I said at the start, the overall palette is muted so when I need to achieve high chroma colors akin to permanent green light, cadmium yellow medium or cadmium red, I really need to add those to the palette to achieve a broader range. I don’t mind doing that, since the need for opaque pigments to round out this palette is welcome. The missing component is an opaque blue. Cerulean does not really function for me as an ideal opaque blue. It’s intriguing that a fairly neutral or cool opaque blue has never been synthesized. Regardless of its few shortcomings, I am anxious to put this palette through a real challenge and take it outside for a plein air session. Perhaps I will post the completed painting. Do you have a favorite simple, minimal palette of colors? Please share them with me. I always find it interesting to discover what colors an artist is using. Palettes
6/11/2007 2:41:57 PM (Eastern Daylight Time, UTC-04:00)
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