Ultramarine, the Blue Paint Brought Across the Sea
Hundreds of years ago, some blue paint cost a great deal of money. Painters in Europe called it ultramarine, a name that means "beyond the sea." The blue did not come from nearby. It was carried across the sea from far away.
The paint began as a stone called lapis lazuli. This deep blue rock was dug out of mountains in Afghanistan and sent to workshops by long trade routes. Making a good pigment from it took patience. Workers ground the stone to a powder, then kneaded the powder with wax and oils, and washed it again and again. Only the purest blue settled out in the end.
Because the work was slow and the stone was costly, a painter might save ultramarine for the most important parts of a picture. A rich client sometimes even paid for the paint separately. Cheaper blues were used for skies and backgrounds.
Things changed in the 1800s, when chemists learned how to make a similar blue in a factory. The new color was bright, steady, and much less expensive. Today an artist can buy a tube of ultramarine at a shop for a small price. Even so, the paint still carries a name from the days when a color could cross an ocean.