Frequently Asked Questions

How do I know when I've had enough sun for the day?

LogicInk UV is formulated to help people with sensitive skin stay within safe daily UV limits. This UV limit is approximately 1 SED, which is a unit of UV radiation energy. The World Health Organization specifies 2 SEDs as the amount of UV radiation necessary to produce a noticeable redness in a sensitive skin. If your skin burns easily, you’ll want to apply or reapply sunscreen, cover up or find shade before the last segment turns completely pink. But people of all skin types can be harmed by too much UV exposure. LogicInk helps everyone remember to take action to prevent skin damage.

How long does LogicInk last?

LogicInk is designed to measure the cumulative effect of one day in the sun. We do not recommend you use it a second day.

Is LogicInk UV safe for children?

Yes! LogicInk is a great way to ensure your children aren’t getting too much sun. The easy-to-read design clearly alerts you when a safe UV limit has been reached. Use LogicInk and help minimize the cumulative effects of sun exposure that start in childhood.

Is LogicInk UV waterproof?

Yes! LogicInk's adhesive is gentle on your skin yet resilient enough to last in the water. LogicInk is for people of all ages and lifestyles.

Is LogicInk UV compatible with my sunscreen?

We recommend you apply LogicInk on clean, dry skin. Apply sunscreen per your sunscreen's instructions. 

LogicInk is compatible with pure physical sunscreens only (e.g. titanium dioxide or zinc oxide).

When applying a physical sunscreen on top of LogicInk, sunscreen will expire faster from LogicInk's surface than it does on your skin, functioning as an early warning to take action: re-apply sunscreen, seek shade, or cover up. 

How can a smartphone enhance the LogicInk experience?

Unlike similar electronic-based products, LogicInk does not require a smartphone to know if you had enough sun for the day. LogicInk is thoughtfully designed with clear changing shapes and bold colors so you can see your UV status with just a glance. An optional mobile app lets you scan your LogicInk "tattoo" –e.g. at the end of the day– to track UV exposure patterns over longer periods of time, among other services to come.