Device and method for determination of safe tanning time

A container for sunscreen agent in which the sunscreen agent has a predetermined sun-protection factor, comprising:

• a sealing device configured to close the container and completely seal an orifice of the container;
• at least one sun sensor configured to indicate a current UV intensity by changing its hue depending on UV intensity of radiation striking the at least one sun sensor;
• a color-reference range configured for comparative reading of the hue of the sensor to enable a determination of UV intensity, and
• a time indicator configured for determining a period of time during which a person of a specific skin type can expose his or her skin to solar radiation at the determined UV intensity without sunburn arising, provided the person has applied the sunscreen agent from the container to the skin.

A method for determining safe tanning time, the method comprising:

• removing a sealing device from an orifice of a container having a sunscreen agent to uncover a sun sensor;
• exposing the sun sensor to UV radiation such that the sun sensor changes its hue;
• comparing the hue of the sun sensor to a predetermined color range to determine current UV intensity;
• determining a skin type using a skin-type table;
• and
• determining a safe tanning time based upon a UV intensity and skin type in a sun matrix.