Showing posts with label lapis lazuli. Show all posts
Showing posts with label lapis lazuli. Show all posts

Thursday, July 21, 2016

A New Blue

     There is a new blue in the world. It was accidentally discovered by Oregon State University researchers who were testing compounds for uses in electronics. The pigment ha been named YInMn Blue after its three elements - Yttrium, Indium and Manganese. The mixture was brown but turned to a brilliant blue in the heat of a furnace - an entirely new pigment.  Because of the rare elements, it will sell around $1000 per kilogram - so, although it can be mixed into paints and plastics, it is doubtful that it will be lavished on canvases in paintings. It has some other interesting  aspects - it absorbs UV light and resists high temperatures so it could be used for cooling roofs.
     This is not the first pricey blue. Artists of the Renaissance's Ultramarine (which means " from beyond the sea") came from a gemstone called lapis lazuli which was more expensive than gold. Ancient Egyptians had a blue that was made from azurite, a copper carbonate mineral. This was still used by 15th century Renaissance artists , sometimes as an underpainting for the more costly Ultramarine. Artists' contracts often specified that Ultramarine  was not to be substituted by the cheaper azurite as it was to denote the patron's status and wealth.
    Woad was used in northern Europe ever since the ancient Britons used it to dye their faces blue to strike fear into Julius Caesar's invading army.  Artist monks used woad to illuminate the Book of Kells in the eight century. Then Indigo was imported from India and it was 30 times stronger than woad. It became available to painters who sometimes used it to underpaint azurite to give it more depth and warm its effect.
     Smalt was a deep blue colour produced from cobalt oxide that replaced azurite. It was used widely from the sixteenth to the eighteenth century . J.M.W. Turner (1775-1850) was said to use great quantities of "smalts of various intensities".
     Artists nowadays are fortunate to have a choice of blues available- as I did in the above plein air painting "From the Balcony" .
     There will be more on blues - my main reference for this is Simon Jenning's "Artists Color Manual" from Chronicle Books.




Sunday, June 15, 2014

Finished the Iris painting

I started this one just before DoorsOpen- having it roughly blocked in and intending to work on it during the Open Studio. Well, I did not get very much done. Then, the Irises, which had looked so great earlier, decided to "finish" -leaving only two survivors. I picked one - to have it as a close-up to paint by - and it promptly died!  Fortunately, I had taken photos earlier so I was able to complete the painting- in spite of lack of cooperation on the part of the models. I used some quinoxidine purple, some cobalt blue, some Azo yellow and I was wondering what a medieval artist would think of the colour assortment that I have- especially the man-made colours. We, in this age, are very fortunate with our colour selection and the studies that have gone into it. The National Gallery in London, England is opening a new show called "Making Colour" with the galleries arranged by dominant colours in the paintings. The history of what was available is then clearly visible. At one point, blue was very costly as it came from the gemstone Lapis Lazuli . It was often reserved for the robes of the Virgin Mary. Today, we have Ultramarine - in red or green shade, Phthalo Blue, Cerulean, Cobalt--- a wealth of blues. Van Gogh used some yellows - one of his favourite colours- that have unfortunately darkened but today we can read lab tests about permanency and see samples for transparency or opaqueness. We really have a tremendous wealth in current available pigments.