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color pigments

02/06/2009 6:25 PM

I am an art teacher. I would like to know what minerals or chemicals make the colors of yellow, blue and red. Like: do they make yellow out of sulphur rock or out of plant material or what? How do they make these color pigments? Where do they get the materials to produce these colors?

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#1

Re: color pigments

02/06/2009 8:40 PM

There's a good primer on Wikipedia : http://en.wikipedia.org/wiki/Pigment

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#6
In reply to #1

Re: color pigments

02/07/2009 5:15 PM

Thank you so much. Your information was just what I needed.

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#2

Re: color pigments

02/06/2009 8:43 PM

Where are you an art teacher and how did you get your credentials? This is stuff I learned in school as a child. No wonder our children can graduate high school and not even be able to read.

I'm sure there are quite a number of good references in Wiki, not to mention even the dictionary. I suppose you didn't learn basic research techniques either.

I must tell you your question has inflamed my wrath and added credence to a long held belief.

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#10
In reply to #2

Re: color pigments

02/08/2009 1:23 AM

I am afraid your response was unkind if not rude.

I dont think its nice to be angry about others ignorance.

And such reponses intimidate one from trying to know.

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Anonymous Poster
#14
In reply to #10

Re: color pigments

02/08/2009 4:49 AM

Shadetree may have offended your sensibilities but he's perfectly correct in his response and his tone.

An art TEACHER, no less, that doesn't know how paint pigments are made, and even worse, can't be bothered to do even a cursory search, is a disgrace and should be stripped of all their credentials.

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#17
In reply to #2

Re: color pigments

02/08/2009 8:35 AM

Thank God someone is paying attention ! You're right on the money.

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#23
In reply to #2

Re: color pigments

02/13/2009 10:56 AM

Easy now! Don't you remember: Those who can't, teach. No reason painting arts should be an exception.

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#3

Re: color pigments

02/06/2009 9:26 PM

interest, are you going to produce the pigments? or you wish to learn the history of art, color fineart?

I know a little, but you can ifnd them in art history textbook.

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#4

Re: color pigments

02/07/2009 8:26 AM

Hi Loana, and welcome. I don't know where you are but the others are correct in the fact that this is all common info for an art student, so a teacher should know it. Were you trained as an art teacher or did you just "get the job" on your experiences?

The reason I ask where you are from is because different methods are used in different countries. In most cases lead is still used as a pigment for yellow paint. Since you have access to the internet, and most likely a library, please look it up. It is all there. Or take a night course and use the knowledge to help your students the following day. Many school systems, in the US, will pay all or part of your continuing education if it pertains to your academic field. Best of luck.

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#5

Re: color pigments

02/07/2009 11:33 AM

Loana,

I am sorry I came off hard in my last post. It must be the pain talking. It's really the pits getting old and cranky.

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#7
In reply to #5

Re: color pigments

02/07/2009 11:23 PM

Hi Shadetree,

I saw rour earlier post and was a little taken aback by your tone although I agree with your feelings on the current state of education in the US.

My sister home-schooled her kids and they, I believe, got a better education than most publicly-educated kids.

You might already know this, but ranting at teachers is not the solution. Most of them are just trying to do their job in the best way that they know how. The real foe is the NEA. The only way to deal with them is through legislation which, unfortunately, is increasingly difficult due to the liberal/socialistic bent of our society.

You did well to apologize for the tone of your earlier post and I sympathize with your ideals.

Mike

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#9
In reply to #5

Re: color pigments

02/07/2009 11:36 PM

Hi again Shadetree,

I also meant to ask what pain you are in. Is it something you deal with day-to-day?

I hope my last post didn't cause you more.

Mike

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#11
In reply to #5

Re: color pigments

02/08/2009 1:29 AM

That was so nice and cute of you....

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#8

Re: color pigments

02/07/2009 11:30 PM

Hi Loana,

The first pigments were made from various plant, mineral, and animal sources.

Look up indigo, mauve, carmine, "chrome yellow", and any other color that you can think of. Wikipedia has quite a lot of information on colors/dyes and where they came from. Just use Google!

Mike

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#12

Re: color pigments

02/08/2009 3:12 AM

Hi Loana

There is one yellow, namely Naples Yellow, that has a very strange origin. It is made by feeding cows only with Mangoes (In India) for extended times and then collecting the urine. This is then evaporated and the pigment left is a light yellow but very opaque. It can be mixed with blue with out getting a green. This is not easy to achieve and is a bit like mixing gunpowder. A bit more or less does matter. I assure you I am not taking the piss. What a hard word for such a soft color.

Now, back to the drawing board and teach them how to draw first. It is good training for the eyes and is a gift for life.

Don't worry about the shade color of a tree yet, that is much more complex and can be a painful process.

You go and teach and learn at the same time. No damage done! Good luck, Ky.

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#13

Re: color pigments

02/08/2009 4:20 AM

I did a Google search with "make your own paint", there were hundreds of hits, that is an easy way for you to answer your own question. Try this link first:-

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#15

Let's be positive...

02/08/2009 6:40 AM

My wife has a fine arts degree and knows the history of pigments well. But one can be an qualified art teacher at the K-12 level in the US with a teaching degree that focuses more on student learning techniques and the schoolday practicum than on knowledge of the physical media.

I know someone who was intimidated by the idea of internet searching just a year ago and would not have thought to go to Wikipedia or Google. So congratulations to Loana Broadbent for trying to go one step further than her job description requires.

I believe one of the purposes of CR4 is to be an Engineering Embassy, to bring a little bit of Engineering to those who aren't trained in it. May all of our citizens realize how empiricism and knowledge of the physical layer of reality helps them to ensure the survival of the good parts of our civilizations, the extinction of the bad parts, and resist the marketers and the magical thinkers...

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#16
In reply to #15

Re: Let's be positive...

02/08/2009 7:41 AM

Yellow light is of the free quency of 560nm and is combination of red-green and also red-green and blue. This is also call RGB in commonly used in color combination development of color TV which is common in every one home.

Any mineral which has ability to absorb blue color and let red and green reflect back will be color yellow.

If blue is partially absorbed then we will have different shade of yellow as we see in nature.

IS this is enough explaination or we need to explain more

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#18
In reply to #15

Re: Let's be positive...

02/08/2009 3:56 PM

Google search is equal to raising one's hand to ask the teacher, congratulation for exceeding minimum expectations.

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#22
In reply to #18

Re: Let's be positive...

02/12/2009 4:26 AM

GOOD ONE !!!!!!!!!!

Funnier, even, is this comment from response # 19 (name too long):

There are good deal of literatures availabble.....

Gee, why is America in the crapper?

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#19

Re: color pigments

02/09/2009 6:22 AM

There are good deal of literatures availabble on inorganic colouring matter.

ferrous salts-green,copper,cobal salts-blue,chrome salts-yellow to orange and so on.you will find details on books on inorganic pigment manufacture as well refer colored metalic salts in inorganic chemistry.

sumarthandan@gmail.com

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#20

Re: color pigments

02/10/2009 3:05 AM

Hi, all,

it seems your relatives are all dedicated at art. anyone can suggest me some good art bbs, forum? pm to me

thanks

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#24
In reply to #20

Re: color pigments

02/13/2009 8:02 PM

it seems none here know extra bbs about art as well as forum.

or them maybe too selfnish to talk out.

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#25
In reply to #24

Re: color pigments

02/13/2009 8:10 PM

I suppose there is some linkage between art and engineering. In fact I think something that is well engineered is a thing of beauty.

In western cultures, however, the two are seldom mixed.

If I were interested in art for arts sake I would probably be chatting on a forum dedicated to the subject.

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#26
In reply to #25

Re: color pigments

02/16/2009 3:25 AM

but when I read western science and culture history. I found no difficult that most of them both scienists and artists.

most of them are painter and engineers, or musician and sciensits. I can list many examples.

btw, any mathmatician out there? I hve some geometry problem wish to ask for help.

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#27
In reply to #26

Re: color pigments

02/16/2009 1:17 PM

Yes I suppose you are right. In order to produce pleasing art it is necessary to have some idea of the science - and when science is done well it is a thing of beauty.

My previous statement must have been a pigment of my imagination.

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#28
In reply to #27

Re: color pigments

02/16/2009 9:32 PM

doesnt matter,

when you know Davince, you will know beauty between science and art. when you know Enstain, you will know wonderful harmonious between science and music.

I wish there will be more artists come to join us. and can offer us more art forums

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#21

Re: color pigments

02/11/2009 9:47 AM

Dear Loana,

I am a Color Chemist for a very large chemical company and have worked with color pigments and dyes for over 22 years in plastics. Many of the colorants used in artist paste type formulations can be either inorganic or organic (synthesized chemicals). A very common yellow or red artist paste is based on cadmium sulfide - yellows & cadmium sulfoselenide - reds. There are also iron oxide reds and iron oxide yellows. These are typically much less intense in chroma Vs. the cadmium based colorants. Most inorganic colorants are based on ore - like iron ore or other types of ores mined from the ground. These ores are refined and sometimes chemically reacted with other ingredients to make the final chemical. There are a wide range of chemicals used in blue artist pastes. There are ultramarine pigments that are based on aluminum, sulfur, sodium and silicate which come from ore and are heat treated to form the final color pigment. There are also organic synthesized phthalocyanine pigments which are very complex organic type molecules that are man made and synthesized in a reactor. White pigments like Tio2 which is very common in coloring many white articles like paints, plastics, etc come from titanium ore which is then heat treated and processed to make Titanium dioxide.

A very good resource and website for you to check out is specad.org. This is the Society of Plastics Color and Appearance Organization and it has a wealth of information about colorants and how they evolved.

Regards,

Scott

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Users who posted comments:

Andy Germany (1); Anonymous Poster (3); bwire (1); cnpower (5); DRFREON (2); HouseSheep (1); jooka (2); ky (1); Loana Broadbent (1); Masyood (1); Mikerho (3); not so smart (1); s.udhayamarthandan (1); Shadetree (4); stevem (1)

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