Colors Red Blue Why can't the primary colors (red, blue, and yellow) be created using any other combination of colors?
In art, the three primary pigment colors are red, blue, and yellow. According to books on painting, these pigments can’t be created using any other combination of colors, Is this true and, if so, why?
The color of light is determined only by its wavelength. So there is no primary color from the standpoint of a physicist. And the chemistry of pigments is so complicated, I can't see how you could have primary pigment colors. Maybe the physiology of the eye is what determines the primary colors.
Let's take blue as an example. Blue pigment appears as it does because it reflects ONLY blue wavelengths of light. If we mix ANY 2 or more pigments together, the resulting mixture will reflect more than one color and the eye will NOT see this as pure blue. Instead it will see some of EACH of the pigments in the mixture.
Mr. Black Ink (Blue, Red & White) Color Test and Review - oinkartltd.com
if red, blue, and yellow are primary colors, what is white?
red, yellow, and blue are primary colors and cannot be made from any other color. If red, blue, and yellow are primary colors, what is white? What colors make white if its not a primary color?
We see colours because when white light (made up of all colours of the spectrum) hits an object, certain colour wavelengths reflect off of the object and go to our eyes, those reflected wavelengths are what colour we see. An object we see as black has absorbed all the colour wavelengths in the white light and therefore is not a colour but a white object has reflected all the colour wavelengths in the white light and therefore is a colour.
But in terms of art, adding white means to tint a colour and adding black means to shade a colour.
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James,
Thank you for your comments – I'll try to address each question.
First – the performance of a loose or mounted diamond can easily be shown with a simple tool from the AGS known as the ASET (angular spectrum evaluation tool). Based on research for diamond cut, the ASET was developed to show brightness, contrast, and leakage with the colors of red, blue, green and black. And, it doesn't matter what light source you are using — store light, daylight, candle light, etc.
You are right in that the diamond can look different after taking it out of the store, but the ASET image won't change. In fact, it can be used to help identify the diamond – for example, helping the customer feel comfortable leaving it with the jeweler. This is not like other viewers which show the proportion/symmetry of the cut. This viewer shows light performance based on a 3-dimensional image.
In the past, diamonds were graded for cut by considering only 17 facets – now we consider all 58 facets. You may have read about painting and digging. This can be seen with the ASET. You might not be able to see the difference from 24 inches away; however, the value of the diamond is affected. In some cases of painting and digging, the diamond loses enough light return that it will look smaller since the light return is not as great around the edges.
That's not to say that an AGS Ideal cut diamond is the only quality to purchase. It can be beyond the budget of many consumers. One should also consider the other factors of symmetry and polish, along with color, clarity and carat weight. The ASET separates the performance from even minor variations in symmetry and polish which can affect the final cut grade, but not the overall brightness and beauty of the diamond.
I've tried to say a lot in a small amount of space, but overall, performance grading helps to prevent the feeling that diamonds are a commodity which can be bought and sold with only the information on a “cert”. Performance grading can position the jeweler to sell value and not just price. You can read more about performance grading on the AGS website, http://www.AmericanGemSociety.org …Dii
Nanny Noi
hmm….I think it's a white flag when you surrender because white is very neutral.
Pink panther because it's alliteration…
P's begin both words
Dani =)
agsblingblog
James,
Thank you for your comments – I'll try to address each question.
First – the performance of a loose or mounted diamond can easily be shown with a simple tool from the AGS known as the ASET (angular spectrum evaluation tool). Based on research for diamond cut, the ASET was developed to show brightness, contrast, and leakage with the colors of red, blue, green and black. And, it doesn't matter what light source you are using — store light, daylight, candle light, etc.
You are right in that the diamond can look different after taking it out of the store, but the ASET image won't change. In fact, it can be used to help identify the diamond – for example, helping the customer feel comfortable leaving it with the jeweler. This is not like other viewers which show the proportion/symmetry of the cut. This viewer shows light performance based on a 3-dimensional image.
In the past, diamonds were graded for cut by considering only 17 facets – now we consider all 58 facets. You may have read about painting and digging. This can be seen with the ASET. You might not be able to see the difference from 24 inches away; however, the value of the diamond is affected. In some cases of painting and digging, the diamond loses enough light return that it will look smaller since the light return is not as great around the edges.
That's not to say that an AGS Ideal cut diamond is the only quality to purchase. It can be beyond the budget of many consumers. One should also consider the other factors of symmetry and polish, along with color, clarity and carat weight. The ASET separates the performance from even minor variations in symmetry and polish which can affect the final cut grade, but not the overall brightness and beauty of the diamond.
I've tried to say a lot in a small amount of space, but overall, performance grading helps to prevent the feeling that diamonds are a commodity which can be bought and sold with only the information on a “cert”. Performance grading can position the jeweler to sell value and not just price. You can read more about performance grading on the AGS website, http://www.AmericanGemSociety.org …Dii