Tuesday, September 7, 2010
Additive/ Subtractive Experiments
Through the in-class experiments, it was an easier way to memorize how the color changing process works. As artists, we are more visual learners than other forms of learning so the experiments really help. With the additive experiments, it was really interesting to see green and red make a yellow when most of us are use to red and orange making green. The subtractive theory was more common to me and I greatly understand the process of mixing colors. Although, I've never made black with all three primaries; I've only made shades of brown. I'm still slightly confused on how the whole bubble part of the experiments work. I sort of understand how its like Newton's experiment with the glass prism, but not how the bubble changed colors from cyan to yellow. Also we never really finished the conversation on how printer's primary colors are cyan, yellow, magenta, and black, so I'm still questioning the process of how that works.
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It is true that the bubble functions similarly to the prism. It is a transparent surface that light can pass through. Refraction occurs, which is why we can see color on the bubble's surface. Instead of a well defined linear refraction of ROYGBIV like with a prism, the bubble's surface interferes with the refracted light rays. Some light reflects directly off the surface, while some penetrates the surface and bounces off before reemerging. The factor that affects the visible color of a bubble is the varying thickness of the bubble's wall.
ReplyDeleteAs for the cyan, magenta, yellow, and black of process printing: The traditional subtractive primary colors of red, yellow, and blue predate modern scientific theory, which has shown that CMY are the correct colors to use when printing with pigment. The cyan, magenta, and yellow primary colors associated with CMYK printing are sometimes known as "process blue", "process red", and "process yellow".