Apple Watch: Tattoos might affect its operation

The various models of Apple Watch have already hit the market with a variety of straps to choose from and prices ranging from 349 up to $ 17,000, suitable for all kinds of budgets. However, as has been told the Watch would not be made ​​for people with tattoos, because it might not work as it should.

Apparently, many users are complaining of a technical problem with your Apple Watch, and that does not properly recognize the wrist owner if this is deeply tattooed. As seen, the Watch does not take very well with the tattoo ink.

The first complaints about Apple Watch have begun to appear in a forum thread Reddit. These users explained that when the Watch get tattooed on his wrist this begins to have a malfunction, as we tell you then.

How it behaves the Apple Watch tattooed skin?

Some users explain that to get the Apple Watch wrist tattooed on the screen was blocked and returned to ask for the password, which only made ​​when it is removed from the wrist for safety. This problem might consider as principal, as a result of it the user can not receive notifications in the Watch or use it to pay with apple pay.

After several tests, it appears that these technical problems lie in Apple Watch cardiac sensors on the bottom of the watch case, which does not give skin properly if you have very dark tattoos. One of the users of Reddit is a hypothesis about the problem of Watch, which explained in detail through the forum.

"Oxyhemoglobin has several local absorption peaks that are used to measure the pulse by oximetry, one is green, another yellow, another infrared ... Apple uses green and infrared parts of the spectrum. Now, here are some key facts. Melanin and are equally good ink absorbing frequencies above 500 nanometers, which unfortunately includes green. But melanin absorption falls so rapidly that hardly absorbs nothing when it reaches the infrared part of the spectrum. That, coupled with the fact that Apple sets the sensitivity dynamically means that infrared light sensor probably work perfectly on the black skin. However, the skin with ink has a more gradual rate of adoption, so that the sensor may not work well. "


Watch Apple sensor would be the source of the problem

Days ago we explained how Apple Watch measures the heart rate through the sensor having at the bottom. As the guys say CultofMac , Apple says on its website operation integrated into the Watch Heart Rate Sensor and everything seems to indicate that the origin of the problems would be in the way in which the tattooed skin absorbs light.

So, Apple says the Watch uses LED lights green with light sensitive for detecting the amount of blood flowing through the wrist at a certain time photodiodes. Watch Apple sensor can detect the heartbeat through the blood flowed on the wrist to calculate beats per minute.

On the other hand, the US company mentioned that there may be cases where the Watch can not measure the pulse, without having at any time of tattoos. For now, Apple has not commented about it, but could not take much to do to discuss this problem, which has already begun to call on the network as Tattogate.