Paint and pigments

[hermes2015]

yes!

i would do that in a heartbeat

apparently he has the motot mounted high enough to keep the front end down

at high speeds theres always a tendency to lighten the front end on a wheel driven machine. this thing turns all the rules upside down

Here's a trivium about the video: The colour of the Ferrari is a pigment called PR254, a pyrrole red, which is sold in tubes of artist's oils by Winsor & Newton under the name of Bright Red. It's a useful red colour I like to use.

[billy rubin]

hermez, whats the history on major pigments? what were the earliezt prehistoric pigmentz, and what was added over time?

what waz mineral and what was organic?

feel free to make a v ery long answer , if you have time. pigments are fascinating and i dont know jack about them.

[hermes2015]

hermez, whats the history on major pigments? what were the earliezt prehistoric pigmentz, and what was added over time?

what waz mineral and what was organic?

feel free to make a v ery long answer , if you have time. pigments are fascinating and i dont know jack about them.

The earliest pigments were mainly naturally occurring iron oxides found in clays. These ochres range from black to yellow and red, and were used in cave paintings. The earliest whites were lead salts like carbonates. Later other inorganic salts, some very toxic, were used. One of the most expensive blues was ground lapis lazuli. In more modern times synthetic pigments, often organic compounds, were developed.

Currently the trend is to use very stable, non-toxic organic compounds in artist's paints. For instance, many artists are moving away from the wonderful cadmium red (PR108) towards safe organic substitutes like PR254.

It is thought that Napoleon was poisoned by the very toxic arsenic-based emerald green used in wallpaper in his room.

Pigments and dyes (in the textile industry) are a fascinating branch of chemistry. If you are interested, there is a good reference site at
http://www.artiscreation.com/Color_index_names.html#.Xv4Qb_Ffjmh

[Tank]

Split off the paint and pigments subject.

[billy rubin]

The earliest pigments were mainly naturally occurring iron oxides found in clays. These ochres range from black to yellow and red, and were used in cave paintings. The earliest whites were lead salts like carbonates. Later other inorganic salts, some very toxic, were used. One of the most expensive blues was ground lapis lazuli. In more modern times synthetic pigments, often organic compounds, were developed.

Currently the trend is to use very stable, non-toxic organic compounds in artist's paints. For instance, many artists are moving away from the wonderful cadmium red (PR108) towards safe organic substitutes like PR254.

It is thought that Napoleon was poisoned by the very toxic arsenic-based emerald green used in wallpaper in his room.

Pigments and dyes (in the textile industry) are a fascinating branch of chemistry. If you are interested, there is a good reference site at
http://www.artiscreation.com/Color_index_names.html#.Xv4Qb_Ffjmh

now i have another field of knowledge to try to learn about.

colors are interesting in biology, because they often reflect culture more than hue.

horses can be bay, chestnut, palamino, buff, and so on. mice can be buff with a fulvous band. and so  on. there;s glaucous. now i have to go look through my field guides

how much has artistic expression been modified in the past because of the availability of certain types of pigments?

i'm reminded of a an early 20th century photographer who made specctacular art using a specific platinum printing process. when the process was discontinued commercially he gave up photography

[billy rubin]

i just came across this

http://www.bsafiles.se/misc/BSA_Color_Codes.htm

[hermes2015]

Split off the paint and pigments subject.

Thanks, Tank. It is one of my interests, as you may have noticed. Although most artists are not terribly concerned with the chemistry of their paints, most worry about the light fastness of the pigments they use. In recent years some painters have become somewhat paranoid about the toxicity of certain pigments, but lead or cadmium poisoning from artist's paints is actually very unlikely. Traditional solvents are another matter, and I support the trend to move away from turpentine and volatile organic solvents.

I am aware of the technology of artist's materials, because I turn into a chemist when the moon is full.

[hermes2015]

.... how much has artistic expression been modified in the past because of the availability of certain types of pigments?

Some artists are associated with certain pigments. The case of Yves Klein is an extreme one, where he patented a blue known as International Klein Blue, a variant of ultramarine:

https://en.wikipedia.org/wiki/International_Klein_Blue

Another example is Pierre Soulages, who is known for his black paintings. He coined the name "outrenoir" for the black paintings.

https://www.google.com/search?sxsrf=ALeKk00xZp5DefxbD7nnIOXKgHgu_WVWYA:1593749106345&source=univ&tbm=isch&q=pierre+soulages&sa=X&ved=2ahUKEwiF1eCKmrDqAhVwTxUIHUTuCAoQiR56BAgNEBQ&biw=1876&bih=936

I have admired Klein and Soulages since I was a boy. They, and other artists, were always my heroes.

[Recusant]

Related, I think. From a couple of years ago--I think mauve is no longer "the colour of the season."

"Mauve: the History of the Colour that Revolutionized the World" | OpenMind

While still a teenaged student, William Henry Perkin accidentally discovered the first synthetic organic dye in history, that of the colour mauve. It was a profitable mistake that demonstrated the enormous possibilities of chemistry, a science that in the mid-nineteenth century had just been born and scarcely had any applications. Here we review how this discovery changed the history of chemistry—in addition to contributing to great advances in other sciences—now that it's 180 years since Perkin's birth and he is back in fashion more than ever, with mauve as the colour of the season.

[Continues . . .]

[hermes2015]

Related, I think. From a couple of years ago--I think mauve is no longer "the colour of the season."

"Mauve: the History of the Colour that Revolutionized the World" | OpenMind

While still a teenaged student, William Henry Perkin accidentally discovered the first synthetic organic dye in history, that of the colour mauve. It was a profitable mistake that demonstrated the enormous possibilities of chemistry, a science that in the mid-nineteenth century had just been born and scarcely had any applications. Here we review how this discovery changed the history of chemistry—in addition to contributing to great advances in other sciences—now that it's 180 years since Perkin's birth and he is back in fashion more than ever, with mauve as the colour of the season.

[Continues . . .]

That was taught as part of our undergraduate organic chemistry course. So many important discoveries were accidental.

[jumbojak]

How dangerous is turpentine? I used to use it all the time. Don't get me started on ethyl benzene. You can pry that from my cold, dead hands...

[hermes2015]

How dangerous is turpentine? I used to use it all the time. Don't get me started on ethyl benzene. You can pry that from my cold, dead hands...

Turpentine isn't terribly toxic, but repeated exposure can lead to allergic respiratory reactions in some people. Once one has developed hypersensitivity, it can induce asthma-like reactions. I would be much more wary of using ethylbenzene indoors. Its parent molecule, benzene, is a potent carcinogen, and should be avoided at all costs, even outdoors. Remember that many of these chemicals can enter the bloodstream via skin absorption. An example is dimethylsulphoxide. If you put a drop of DMSO on your hand, you can taste it a few seconds later.

What do you use ethylbenzene for?

[billy rubin]

wow

seven years and then kaput

lol

The show was a critical and commercial success, traveling to Paris, Düsseldorf and London. The Parisian exhibition, at the Iris Clert Gallery in May 1957, became a seminal happening.[3] To mark the opening, 1001 blue balloons were released and blue postcards were sent out using IKB stamps that Klein had bribed the postal service to accept as legitimate.[15] Concurrently, an exhibition of tubs of blue pigment and fire paintings was held at Galerie Collette Allendy.[16]

[hermes2015]

One has to experience Yves Klein's work in the flesh to get drawn into his International Klein Blue. PC monitors and photos can't do it. It's the same with Rothko's paintings.

I've read that the special PVA medium used with the powdered ultramarine is in part responsible for the unique character of IKB.

[hermes2015]

A video about French Ultramarine, which has the Pigment Code PB29.