uv cards

• gauge the strength of UV rays
• changes to a shade of purple when exposed
• 15 to 20 seconds to take a reading
• incorporates a UV sensitive area
• general measurement against a colour scale

The UV Intensity card enables individuals to gauge the strength of the sun's ultraviolet rays by giving a general measurement against a colour scale.

The card incorporates a UV sensitive area that changes to a shade of purple when exposed to sunlight.

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