Hi,
This is my knowledge since I work in a fashion jewelry company.
The state of California has lead and nickel requirements for jewelry in order for the jewelry to be considered safe.
Nickel is not a problem since most jewelry factories in China are nickel-free .
However, California considers jewelry that has less than 600 ppm (parts per million) for lead safe (this is for adult jewelry, for children jewelry it is a lot lower).
If an earring is considered lead/nickel compliant, that means that the earring has some lead/nickel but lower than the threshold.
Lead/nickel free means that they have none.
However, I know that that it is VERY difficult to make completely lead free jewelry if it has metal plating. Many companies put lead free even though they should actually be writing lead compliant.
Just my 2 cents.
it means nickel-free, because some people have reactions to nickel
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There is no difference.
it means nickel-free, because some people have reactions to nickel
the difference is..................................................... i dont know
you can't as such make them nickel free but it does help if you put a coating if clear nail polish over the area that is in contact with your skin.
one is pro and one is free
It doesn't have Nickel in it.
That it does not contain any of the metal nickel.
there is no alcohal in it
Wrinkle free and wrinkle resistance sounds same but there is some difference .
no they dont. they are nickel free :)