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Color and Weave Effect
Published in Yasir Nawab, Syed Talha Ali Hamdani, Khubab Shaker, Structural Textile Design, 2017
Muhammad Zohaib Fazal, Muhammad Imran Khan
There are two theories regarding color mixing. These theories of color mixing are based on the concepts of reflection and absorption. Light theory (additive mixing): When lights of different colors fall on a body and are reflected back, the resultant reflected ray that falls on the retina of the eye is the sum of all the individual reflected rays, which is called additive mixing. For example, in computer monitors, television screens, and in overlapping projected colored lights that are used in theatrical lighting, the phenomena of additive color mixing occur.Pigment theory (subtractive mixing): The mixing of dyes, inks, paint pigments, or natural colorants follows the idea of absorption of light. When different pigments or dyes are mixed together, their individual absorptions sum up in the resultant mixture, thus increasing the amount of absorption of light falling on them and, in the result, decreasing the amount of reflected light. Hence, it is called subtractive mixing. A printer combining several different colored inks on the top of each other on a paper and transparent photographic layers that are sandwiched together to produce color images are examples of subtractive mixing.
Light and Colour
Published in Abdul Al-Azzawi, Photonics, 2017
Newton’s edition of Optics in 1704 described a number of experiments in which he arranged mirrors to direct two different monochromatic components of the spectrum to the same location on a white screen. When he observed the colour of the mixed beams, Newton noticed that he could not always produce white light by mixing two monochromatic colours together. His systematic studies revealed the general rules of colour addition. As described above, each colour has a spectral power distribution. The spectral power distribution of one colour is added to the spectral power distribution of the other colour to produce the net spectral power distribution of the new colour. The rules of additive colour mixing are valid whether or not the light that produces a given colour is monochromatic. For simplicity, it is assumed that the brightness of each original is the same. Mixing green light with red light produces a yellow light. A second example of addition is when blue light and red light are mixed to produce magenta light (a purple). For a third example, blue light and green light are added together to produce cyan light (a turquoise). When the three colours blue, green, and red are mixed additively in various proportions a wider range of colours can be produced. If these three colours have the same proportion and brightness when added, they produce white colour. Therefore, the three colours the red, green, and blue (R, G, and B, respectively) are called primary colours for additive colour mixing. Adding the three primary colours of red, green, and blue lights will create white light, as shown in Figure 6.4.
Design
Published in Wanda Grimsgaard, Design and Strategy, 2023
Additive colour mixing has the primary colours red, green, and blue (RGB), which are generated from light colours. When the three primary colours are mixed in equal proportions, the eye perceives this as white. Additive colour mixing begins with the absence of light (black). When light in different colours hits a surface, several colours are placed on top of each other (added). The light is emitted with different wavelengths and different degrees of intensity, which is perceived by our eyes as colours, like when we are looking at a computer screen. Colours we see on a computer screen, TV screen or an image produced by a projector occur as a result of additive colour mixing.
Colour forecasting
Published in Textile Progress, 2019
Colour is generally categorised into three basic hue types: primary, secondary and intermediary or tertiary. In principle, the additive primary colours, red, green and blue cannot be created through colour mixing; they are the natural colours found in nature, and are components of white light. In subtractive colour mixing the primary colours are cyan, magenta and yellow. Primary colours are considered to be pure [286].