Liquid crystal temperature indicator for measuring human body temperature

A liquid crystal temperature indicator for measuring human body temperature, which temperature indicator comprises a generally planar member suitable for retention against a surface of a body, a plurality of numerals formed at different locations on said planar member;

• the member comprising a transparent plastic film over a plurality of deposits of liquid crystals deposited behind individually associated ones of said numerals, each of said deposits being activatable within an individually associated predetermined temperature range corresponding to a body temperature which is to be measured and being arranged so that, on temperature activation, the deposits emit or reflect visible radiation to make the associated numerals visible at the front of the member, the visible numerals indicating the temperature of the body, an optical filter between said numerals and said liquid crystal deposits for reducing or blocking a blue color response of the liquid crystals upon activation, and unbroken waterproof coating means completely surrounding and encapsulating on all sides of the entire indicator for protecting the deposits from moisture or humidity between said numerals and said liquid crystal deposits.