Is it normal for nickel roundwounds to leave you with black fingertips? Always used stainless steel before, but I was wondering if anyone else noticed this when using nickel strings.
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Is it normal for nickel roundwounds to leave you with black fingertips? Always used stainless steel before, but I was wondering if anyone else noticed this when using nickel strings.
I've only seen this with "pure nickel" strings, which are nickel-iron alloy. I think it's iron. Never seen it with SS or NPS.
Toxicity
Exposure to nickel metal and soluble compounds should not exceed 0.05 mg/cm³ in nickel equivalents per 40-hour work week. Nickel sulfide fume and dust is believed to be carcinogenic, and various other nickel compounds may be as well.[39][40]
Nickel carbonyl, [Ni(CO)4], is an extremely toxic gas. The toxicity of metal carbonyls is a function of both the toxicity of the metal as well as the carbonyl's ability to give off highly toxic carbon monoxide gas, and this one is no exception. It is explosive in air.[41][42]
Sensitized individuals may show an allergy to nickel affecting their skin, also known as dermatitis.
Sensitivity to nickel may also be present in patients with pompholyx.
Nickel is an important cause of contact allergy, partly due to its use in jewelery intended for pierced ears.[43] Nickel allergies affecting pierced ears are often marked by itchy, red skin.
Many earrings are now made nickel-free due to this problem. The amount of nickel which is allowed in products which come into contact with human skin is regulated by the European Union.
In 2002 researchers found amounts of nickel being emitted by 1 and 2 Euro coins far in excess of those standards. This is believed to be due to a galvanic reaction.[44]
It was voted Allergen of the Year in 2008 by the American Contact Dermatitis Society.[45]

I am gonna go out on a limb here and say that some players have a reaction to nickel (truly allergic for some) that can cause this. I would not be so quick to blame "dirty strings" or some manufacturing fault. This is a reaction of certain people's skin chemistry combined with the nickel alloy producing the residue.
If that were the case then I would think that it would have happened with the Daddario XL Nickels that I used for the past 20 years. It's got to be some type of chemical residue left on the strings after manufacturing.
If that were the case then I would think that it would have happened with the Daddario XL Nickels that I used for the past 20 years. It's got to be some type of chemical residue left on the strings after manufacturing.

