"Bone black is the presence of an absence."
Stephanie Krzywonos for Emergence Magazine: https://emergencemagazine.org/essay/museum-of-color/
Spent some monies before tariffs started rolling in and got some phosphors (from the Netherlands).
Now I am making some new colors- a warm white and a pink. Mundy Hepburn was right- when buying phosphors- just get RGB... oh an maybe violet.
Gotta mix these on the ball mill for the recommended two days and then do some test coats- I sure am excited!
realistically I might do a test tomorrow. It will be nice to see how it moves and coats a sample tube.
It sure is coating the jar well after about 20 minutes. That is a 254nm quartz lamp for the argon mercury.
The nitrocellulose coatings are so effective! The chemicals are kinda nasty- but they evaporate rapidly and don't make phosphor waste that cannot be put down the drain.
@HarvardArtRoulette and here's here's a bit of natural ultramarine (aka lazurite, or lapis lazuli) from the Mardan-y-Char mine at Sar-e-Sang, Afghanistan, in the Hunterian Museum collection, Glasgow.
The intensity of this colour is pretty accurate - this is close to the "eye" grade of the most intense blue used for jewellery. Broken coarse crystals known as "lajuaat crystal" grade are still used for pigment production from this mine.
Fellow #watercolor and #pigment nerds, this guy Phil (a chemist and pigment lover) tried, a couple years ago, to manufacture his own batch of the late great PO49 - with some success! If there were a watercolor nerd dating app (and there should be), imagine Phil's DMs.
This was really fun to read, I wish I had a giant chemistry set at home (every living thing I inhabit this house with would like to register their emphatic disagreement with that sentiment, but whatever).
https://www.wetcanvas.com/forums/topic/bringing-back-quinacridone-gold-po49/
Drawpile 2.3 is gonna add a Pigment blend mode, based on MyPaint's. It makes the paint mixing more "realistic", e.g. mixing blue and yellow will result in green instead of a dull gray.
I know there's some people that are very enthusiastic about this stuff. If you are or know someone that is and got a better curve or whatever to use, give a poke somewhere.
For some reference, these are the curves from MyPaint, the T matrix is to go from spectral to linear RGB and the three other arrays are to go from linear RGB to spectral: https://github.com/mypaint/mypaint/blob/master/lib/blending.hpp#L21-L41
MyPaint has some documentation about it and what I think is a curve generation script or something: https://github.com/mypaint/mypaint/tree/master/doc/spectral
(To pre-emptively answer some things. I'm not into this stuff, your gradients wont tell me anything, just give me numbers and I can check how it looks when I plug them in. Yes I know of the Krita merge request and spectral.js, they're unusably slow because they do like over 80 calculations instead of 10. Yes I know of Mixbox, it can't be used for anything because it's under a stupid license.)
Weekend #Plankton #Factoid 
Autotrophs are organisms which use pigments for photosynthesis by absorbing light at specific wavelengths. The dominant chlorophyll-a absorbs #light in the violet-blue (430nm) and red (660nm) wavelengths, but not green, which is why #algae is green. Phycocyanin, an accessory #pigment in #cyanobacteria, absorbs in those green wavelengths, so is blue in colour. This is why we can determine algae types from space.
https://scitechdaily.com/new-research-suggests-earths-first-oceans-werent-blue-they-were-green/
#Science #satellites #oceans
Chemistry Meets Mechatronics in This Engaging Art Piece - There’s a classic grade school science experiment that involves extracting juice f... - https://hackaday.com/2025/03/20/chemistry-meets-mechatronics-in-this-engaging-art-piece/ #electrooxidation #electroreduction #anthocyanin #peristaltic #cabbage #pigment #gantry #art
Further experiments in ink — today a black with cool undertones made from carbonized wild grapevines.
Kyanite is used in porcelain(more dishware and plumbing than art) but it is used in jewelry. Plus it is an index mineral. But I am going to give the art vote to Dioptase for its unparalleled history as a pigment which stretches back to the Neolithic! For the #MinCup24 semi-finals and the last surviving pigment in competition!
The pigment mauve was the first synthetic dye ever created - accidentally discovered in 1856 by 18-year-old chemist William Henry Perkin while attempting to synthesize quinine, a treatment for malaria.
"The invention of blue and purple pigments in ancient times"
A chemical & historical analysis of "Egyptian and Chinese copper-based pigments"
Section 2 contains most of the #chemistry (if you wish to skip over the technical details).
Section 3. Examined Objects provides specific examples from Egyptian & Chinese #art
Section 5. The dissemination of the blue pigments and technology transfer
https://pubs.rsc.org/en/content/articlehtml/2007/cs/b606268g
Prior to the 19th century, the original vermillion pigment was highly toxic due to its mercury and sulfur content.
The vibrant orange color in many fruits and vegetables, such as carrots and oranges, is often due to the presence of pigments called carotenoids.
Safely removing nanoplastics from water using 'Prussian blue', a pigment used to dye jeans
Prussian blue, a metal-organic frameworks-based substance made by adding iron (III) chloride to a potassium ferrocyanide solution, is the first synthetic pigment used to dye jeans a deep blue color and has recently been used to adsorb cesium, a radioactive element, from Japanese nuclear plant wastewater.
https://phys.org/news/2023-10-safely-nanoplastics-prussian-blue-pigment.html #prussianblue #remove #plasic #nanoparticles #jeans #pigment ##hipster #Bioremediation
Guten Morgen! Was war gestern schön was hat euch gefreut? Es sind die kleinen Dinge die zählen. #diekleinendinge
Hier: Zufallsfund in einer Petrischale: ein Bakterium das ein im UV Licht #fluoreszierendes grünlich-blaues Pigment bildet und dadurch eine Galaxie in der Petrischale entstehen lässt.
Das #Bakterium ist #Pseudomonas und das #Pigment eine Mischung aus Pyoverdine (sammelt Eisen) oder Pyocyanine (antibakteriell, erzeugt oxidativen Stress in Zellen, inkl beim Menschen). #Biodiversity
Thermochromic Treatment Keeps Solderless Breadboards Smokeless - There’s a point in a component’s thermal regime that’s between normal operation an... - https://hackaday.com/2023/07/08/thermochromic-treatment-keeps-solderless-breadboards-smokeless/ #solderlessbreadboard #powerdissipation #thermochromic #magicsmoke #mischacks #overload #pigment #thermal #paint
#Carmine, also called #cochineal, is a pigment of a bright-red color obtained from the aluminium complex derived from carminic acid.
Synthetic carminic acid is complex to produce. Therefore, natural cochineal carmine is predominant on the market.
To prepare carmine, powdered scale insect bodies are boiled in an ammonia or sodium carbonate solution. #Gelatin may be added to modify the precipitation.
To obtain 1 pound of red dye, one needs 70,000 cochineal bugs.
A bit of crazy colour! Hyacinth lake turned into watercolour.. Crrraaaaazy blue green 
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#MastoArt #watercolor #pigment #plantbased
