The problem :
Guitarists and bass-players have problems finding their initial chords when a concert starts in total darkness. Even the most gifted and experienced players cast a quick glance at the fingerboard when starting to play. Luminous touch-markers provide a means for them to see where they are easily in the dark.

The current situation :
Some makers have responded by incorporating into the fingerboard diodes fed by twin electric wires. This solution has several major disadvantages: a groove to carry the wires has to be run down the length of the neck, and cavities are needed to hold the diodes. This system is difficult and expensive to repair in the event of breakdown. Placing diodes and wires in the neck can produce secondary vibrations. The electric current in the wires of the neck can introduce potentially troublesome electrostatic and electromagnetic fields. Only a completely insulated system can combat these undesirable effects.

Duvoisin & Co’s solution:
We constantly listen to the musicians who come to see us, and Duvoisin & Co, working with Ace Guitars, have developed a new product, akin to the technique used by clockmakers to make clocks readable at night. The finest luminous products available have been mixed with a special substance to make it injectable, so that it can be incorporated, either by moulding or other means, into markers inset into the wood of the fretboard of guitars and basses. This substance is not dangerous and not in the very slightest bit radioactive.

A few seconds of exposure to natural or artificial light is all that’s needed to restore effective luminosity for thirty to forty minutes. A longer exposure to bright light will make them shine for longer still. At Duvoisin & Co we feel we have found a solution to the problem outlined above.

Markers shine both day and night
No tricks.