Having a necklace restrung might seem like a hassle, especially if you tend to wear it every day. Some people can even be reticent to have an older necklace restrung if it has any sentimental value. However, there are several reasons why it can be a good idea to have the old string replaced, even if you haven't noticed any visible signs of damage.
1. The String Can Get Dirty
Even though much of the string of your necklace won't usually be lying directly against your skin, it can still absorb contaminants such as body oil, perfume and general dirt and grime. The knots will soon begin to look dirty, but this process will take place steadily enough for it to escape your notice. You'll be stunned by just how much fresher the piece looks once the string has been replaced.
2. The String Can Sag
It doesn't matter what kind of string you use, sagging can occur over time. This is particularly true when the necklace holds heavier items, but it can always be a problem. That sagging will make the necklace look worse since there will be more string showing between decorations; additionally, it will sit lower on your chest or neck.
3. The String Can Weaken
Perhaps most importantly of all, older strings will naturally be weaker than newer ones. Even if you've always been careful with the necklace, the pearls, beads or other items will move around while you're moving. Over time, knots can become shredded and the string itself can become worn. This makes breakages far more likely to occur.
4. Knots Can Get Smaller
The knots along your necklace are responsible for two important tasks. First, they keep each decorative element in place; second, they stop all those decorative items coming off at once if a break should ever occur. Unfortunately, knots can get smaller over time, whether by the shredding mentioned above or simply because they have been steadily pulled tighter and tighter.
5. Newer Materials Are Superior
If your necklace is on the older side, the string is probably made from silk. This was the preferred choice for stringing necklaces for a long time, but newer materials are generally better. Nylon, for example, can be spun to look just as supple and beautiful as silk, but it stands up better against moisture and stress. Don't worry, though — you can still request that silk is used if you wish.
Talk with a jeweller about jewellery repair for necklaces if you have specific questions regarding string replacement.