According to the stipulation of the nickel Directive, if the
foregoing nickel release test values were multiplied by 0.1
as the adjustment factor, then the adjusted values d' of all
samples were below 0.5 μg/(cm2·week). It seems reasonable
to think that the experimental alloy could be safely used in
those jewelries directly contacting with human skin, such as
rings, bracelets, bracelets and necklaces. Especially for the
samples quenched plus low-temperature tempered, the adjusted
value is below the threshold value 0.2 μg/(cm2·week)
for piercing jewelry, which also seemed it can be safely
used as puncture accessories.
However, it should be pointed out, for the extremely irregular
shape of jewelries, it is difficult to calculate the
surface area precisely, therefore a compromise measure is
adopted to narrow the testing error between different testing
organizations for the same sample. There are always some
controversies over such a big adjustment, from the latest
trend EU Council would likely cancel or drastically reduce
adjustment factor in the near future[16], it is more suitable to
evaluate the materials by direct test results. While the samples
of this research are regular coupons, their surface areas
can be calculated easily and accurately. Since the actual
nickel release rates under all process conditions exceed the
specified threshold value of the standard, the jewelries made by the processes in the research still face with nickel
allergy risk, especially when it is used in puncture accessories.
According to the stipulation of the nickel Directive, if the
foregoing nickel release test values were multiplied by 0.1
as the adjustment factor, then the adjusted values d' of all
samples were below 0.5 μg/(cm2·week). It seems reasonable
to think that the experimental alloy could be safely used in
those jewelries directly contacting with human skin, such as
rings, bracelets, bracelets and necklaces. Especially for the
samples quenched plus low-temperature tempered, the adjusted
value is below the threshold value 0.2 μg/(cm2·week)
for piercing jewelry, which also seemed it can be safely
used as puncture accessories.
However, it should be pointed out, for the extremely irregular
shape of jewelries, it is difficult to calculate the
surface area precisely, therefore a compromise measure is
adopted to narrow the testing error between different testing
organizations for the same sample. There are always some
controversies over such a big adjustment, from the latest
trend EU Council would likely cancel or drastically reduce
adjustment factor in the near future[16], it is more suitable to
evaluate the materials by direct test results. While the samples
of this research are regular coupons, their surface areas
can be calculated easily and accurately. Since the actual
nickel release rates under all process conditions exceed the
specified threshold value of the standard, the jewelries made by the processes in the research still face with nickel
allergy risk, especially when it is used in puncture accessories.
การแปล กรุณารอสักครู่..
According to the stipulation of the nickel Directive, if the
foregoing nickel release test values were multiplied by 0.1
as the adjustment factor, then the adjusted values d' of all
samples were below 0.5 μg/(cm2·week). It seems reasonable
to think that the experimental alloy could be safely used in
those jewelries directly contacting with human skin, such as
rings, bracelets, bracelets and necklaces. Especially for the
samples quenched plus low-temperature tempered, the adjusted
value is below the threshold value 0.2 μg/(cm2·week)
for piercing jewelry, which also seemed it can be safely
used as puncture accessories.
However, it should be pointed out, for the extremely irregular
shape of jewelries, it is difficult to calculate the
surface area precisely, therefore a compromise measure is
adopted to narrow the testing error between different testing
organizations for the same sample. There are always some
controversies over such a big adjustment, from the latest
trend EU Council would likely cancel or drastically reduce
adjustment factor in the near future[16], it is more suitable to
evaluate the materials by direct test results. While the samples
of this research are regular coupons, their surface areas
can be calculated easily and accurately. Since the actual
nickel release rates under all process conditions exceed the
specified threshold value of the standard, the jewelries made by the processes in the research still face with nickel
allergy risk, especially when it is used in puncture accessories.
การแปล กรุณารอสักครู่..