HOW TO MAINTAIN YOUR BRIDGE IN OPTIMAL CONDITION
Keep an eye on your bridge to prevent warping like this.
Getting the best from your cello bridge.
A good bridge can last indefinitely but it does need constant care and attention from the player to stay in optimal condition. There are three cello bridge care issues to be aware of: warping of the bridge head, splaying of the legs and cutting of the strings into the string grooves.
A good start in life. For a bridge to stay in good condition and to transmit the energy of the player to the body of the cello efficiently, it needs to stand up straight. The best luthiers are fanatical about their wood selection for bridges. We look for a combination of fineness and evenness of growth: the tighter the growth lines (rings) and the straighter the medullary rays (vertical structures) in the wood of the bridge blank, the stronger and more stable the bridge will be. Excellent bridge wood also offers the luthier more scope in the design details of the bridge.
We use top-grade maple bridge blanks made to our own design from the best French manufacturer. They source their maple from the same region as the wood we use for the backs, ribs and scrolls of our cellos, but they choose plain maple without any figure or curl.
Good bridge manufacturers always season their wood, but we like to season our bridges for at least a further five years. Like most luthiers, we also heat treat bridges before use, to release any internal stresses in the wood and give the bridge more stability during its lifetime.
BRIDGE CARE GUIDE
1. Lubricate the string grooves. Each string groove in the bridge and the ebony top nut should be well lubricated by rubbing a piece of dry soap (see below) across the empty string groove until it is full of soap fragments. The presence of the soap will allow the string to slide much more smoothly over the bridge and nut, with far less friction.
If you want to lubricate your string grooves but are not changing the strings, tune down each string by a major third, briefly lift the string out of the string groove while you rub soap into the groove and then replace the string, tune it up and straighten the bridge. Many cellists like to use graphite (pencil lead) to lubricate their string grooves which is an equally effective method, but we prefer to use dry soap as it’s quicker and cleaner.
How to prepare dry soap. The best soap to use is of a basic quality, such as a little tablet of hard and crumbly hotel soap. Nice soaps containing oils which are good for your skin are too soft for our purpose. If you don’t have a cake of old hotel soap, cut a 1cm slice off a bar of basic soap and put it in a warm dry place for a few months until the soap is dried out and shrunken. When you scrape the surface, small flakes should come away like snow. A little piece of soap like this can safely be kept in your cello case and used for your string grooves in the bridge as well as in the nut at the top of the fingerboard – whenever you fit a new string.
2. Straighten your bridge regularly to stop it warping. Even if you use dry soap to lubricate your string grooves, some friction will still occur between the bridge and string every time a new string is fitted or tuned. This friction will drag the bridge fractionally in the direction of the pegs or the tailpiece, depending on whether you are tuning from the pegs or fine tuners. It’s important to note that fine tuners drag the bridge six times more powerfully than pegs, because they are in such close proximity to the bridge. If you use fine tuners regularly, you need to keep a close eye on the bridge and correct its stance away from the tailpiece. It’s worth tuning with your pegs whenever practical to counteract the effect of the fine tuners, but every time you fit a new string, you should assume that the bridge has been pulled towards the peg box and will need straightening. To ensure that the bridge stays upright and in perfect condition through its lifetime, we recommend checking the posture of your bridge at least once a week. If your bridge has already become warped, don’t despair: good luthiers can re-flatten moderately warped bridges (there are a variety of techniques.)