D’Addario Re-Engineers Wire Coating Technology


Presented by D'Addario

The health and longevity of your guitar’s strings can be affected by a number of different factors including weather conditions and oxidation caused by acid from your fingers. While coated strings do offer an added layer of protection, many musicians are reluctant to use them because of the adverse effects this coating can have on the feel and sound of the strings.

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Determined to engineer a product that offered all the benefits of a coated string with the same warmth of tone as you’d get from an uncoated string, D’Addario went to work creating its own unique EXP Coated Technology. With the creation of their new EXP Wire manufacturing facility, D’Addario has invested in wire coating machinery that allows the company to fully control and develop advancements in coating technology for wound strings. In one continuous process, D’Addario’s EXP Wire machine draws wire from the rod, then anneals, cleans, coats, cures and spools it. Every spool of wire is tested with a sophisticated digital micrometer that measures the concentricity of the coating thickness to 2/10,000 of an inch. The result? D’Addario’s revolutionary micro-fine coating has successfully reduced the coating thickness by at least 50%, which allows the string to retain even more of its inherent brightness and natural uncoated tone, while maintaining EXP's renowned durability and long-life characteristics.

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