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The nickel has been recognized that is the latent irritant metal, it may cause the dermatitis of the human who is the allergy.If the nickel contacts the skin, it can stimulate the body immune response and cause rash, sometimes possibly causes the more serious immune response. If people has absorbed the soluble nickel salt, will have the vomiting, disgusting, the diarrhea and so on. European Union, US, Japan etc have made the stipulation to the nickel element content and the release quantity of the human body skin long-term contact's product like pierced the ear or bodily other spot with the nickel product.The conventional test method is to deliver the sample to the laboratory for test, the time is long, the expense is high, the process is complex, has the destruction to the sample, the quantity is small, it can only test the samples, according to the above situations,we empoldered the nickel fast testing reagent cooperated with ITS CHEMICAL,INC. at 2006 , it can carry on the fast screening test to the nickel ion.

Application method:

Clean the area of any dust or dirt. Then drop a glob of nickel fast testing reagent on the cotton stick, and vigorously rub about 30 seconds on the surface of testing material, if the cotton signs pink or the pale pink, then indicated that the material surface contains the nickel (color to be thicker, content is higher),if the cotton does not change color, then indicated that the material surface does not contain the nickel or nickel quantity is less.Because the nickel quantity of the surface of the material is not necessarily even, therefore we s est to test different spots of the material surface, more than 5 spots will be better.