Half a croissant, on a plate, with a sign in front of it saying '50c'
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Colour by Nimbus

Paint the clouds...with nature's help
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A small, thin-walled ball is created, and filled with powdered biodregradable dye. The wall thickness is important as it determines the balls strength. At a certain reduction in atmospheric pressure, the ball will burst, releasing its powdered dye into the immediate environment. But they are light - the size of the balls has been determined to optimise their flying efficiency.
The artist selects his payload from a wide variety of colours and wall thicknesses - will he go for layers of colour, or a more esoteric effect?
The large bag of balls is tied to the plane, and it begins it's treacherous journey toward the thunderstorm. As it reaches the base of the cloud, the balls are slowly released from the bag a few at a time. The overpowering upcurrent of the cumulo-nimbus drags the lightweight spheroids upwards, like the hailstones already building within the cloud.
The payload is delivered. Gradually, as the upcurrent grows stronger and the circulation more powerful, the balls begin to burst as they reach the altitude at which they can no longer contain their colourful contents. Water condenses around the particles creating coloured mist in that area of the cloud.
From a distance, the cloud gradually begins to change colour, with layers of blue and red, pink and all the colours the artist has chosen. But the picture is painted by mother nature, and falls to earth as coloured rain, to degrade in the drains as the thunderstorm passes.
goff, Jun 24 2004

Glitter cloud seeding http://www.halfbake...r_20cloud_20seeding
My version. [phoenix, Oct 04 2004, last modified Oct 05 2004]

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       Great, until the rain paints everything multicoloured. I'm not gonna clean that up.
harderthanjesus, Jun 24 2004
  

       Someone suggested this before, but it seems to have disappeared now. Nice idea if you can keep the advertisers out of it.
DrCurry, Jun 24 2004
  

       The all new warm and fuzzy DrC.. hehehe!
madradish, Jun 24 2004
  

       Not preheated exactly as notated, but as a sidebar reference John Varley and his "Steel Beach" for storms as a form of art.
normzone, Jun 24 2004
  

       Will the dye be completely washable? It sounds beautiful, but I sure wouldn't want to be outside wearing nice clothing when it rains. Look! The sky is raining multicoloured croissants. +
evilmathgenius, Jun 24 2004
  

       May be you could create the dye so that after a few hours in the cloud it breaks down to transparent chemical bi-products - a bit like that pink paint that turns white or the green sunscreen that disappears.
goff, Jun 28 2004
  
      
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