Baby's Physical Goals. Every day is a new adventure during baby's first year, as she hits new physical, emotional and social developmental milestones week after week. Wondering what the average age is for most babies to roll over, sit up on their own, crawl, walk and talk?
It is all attributed to the photoinitiators that added into the gels. The photoinitiators react when exposed to various wavelengths of UV light. Most photoinitiators react upon exposure to 340-410nm of lights. Therefore, nail lamps emits lights in 340-410 can get the nail polishes cured and get them dry.
For the new study, the researchers measured the UV-A rays produced by 17 different nail polish drying devices at 16 salons. UV-A is one of three types of UV ray. It ages the skin to cause wrinkles and breaks DNA strands within skin cells, which can lead to cancer. The lamps tested by the researchers differed in their power levels, but generally UV lamps with higher wattages put out higher levels of UV-A radiation.