"Ikat" means "tied" or "bound" in the Malay language which describes the process. Through common usage the word has come to describe both the process and the cloth itself. Ikats have been woven in cultures all over the world. In Central and South America Ikat is still common in Argentina, Bolivia, Ecuador, Guatemala and Mexico. In the 19th century, the Silk Road desert oases of Bukhara and Samarkand (in what is now Uzbekistan in Central Asia) were famous for their fine silk ikats. India, Japan and several South-East Asia countries have cultures with long histories of Ikat production. Double Ikats can still be found in India, Guatemala, Japan and the Indonesian island of Bali.
Like any craft or art form, ikats vary widely from country to country and region to region. Designs may have symbolic of ritual meaning or have been developed for export trade. Ikats are often symbols of status, wealth, power and prestige. Perhaps because of the difficulty and time required to make ikats, some cultures believe the cloth is imbued with magical powers.
Some patterns have many strands in the cloth that are all dyed the same way which creates a blocky design. In some weaving traditions each strand of the cloth may be dyed differently from the ones next to it. Usually the pattern repeats in symmetrical or asymmetrical ways. In the illustration above, the right side of the weaving is identical to the left. To make these elaborate patterns the weaver will still bundle and dye several threads together, but when the loom is prepared, a single thread will be used from each bundle for each section of the pattern. Elaborate ikat patterns like this are often handed down from generation to generation in the same family.
After the threads are dyed the loom is set up. The pattern is visible to the weaver. Threads can be adjusted so that they line up correctly with each other. Some ikat styles (like in Japan and Guatemala) don't try to get the patterns precisely lined up, others (like in Timor in Indonesia) the patterns are so accurate, that you have to look closely to determine that the pattern was not printed on the cloth.
Dying the weft makes it much more difficult to make ikats with precise patterns. The weft is one continuous strand that is woven back and forth, so any errors in how the string is tied and dyed are cumulative. Because of this, weft ikats are usually used when the precision of the pattern is not the main concern. Some patterns become transformed by the weaving process into irregular and erratic designs.
Double ikats are the most difficult to produce. In the finest examples from India and Indonesia, the warp and the weft are precisely tied and dyed so that the patterns interlock and reinforce each other when the fabric is woven.