wetness indicator

plural wetness indicators

1. A graphic on the rise (front) of a disposable diaper that fades or changes colour when the diaper is wet.

   The wetness indicator is a toy block design on the diaper, its colored letters lighten as the inside of the diaper goes from dry to very wet.

   1980, Charles D. Schewe, Reuben M. Smith, Marketing: concepts and applications, McGraw-Hill, →ISBN, page 10

   2 more examples

   Wetness indicators are increasingly used in diapers to help with visual check. Adding PVA 64 to hot-melts used for diaper assembly has become a true asset in this field due to its capability to carry the moisture to the wetness indicator. When the diaper becomes wet, PVA 64 carries the humidity to the wetness indicator, which changes in color, indicating that the diaper needs to be changed

   2008, Chapal K. Das, Sandeep Kumar, and Tanmoy Rath, “Vinyl Polymer Applications and Special Uses”, in Munmaya K. Mishra, Yusuf Yagci, editor, Handbook of Vinyl Polymers: Radical Polymerization, Process, and Technology, 2 edition, CRC Press, →ISBN, page 577

   The parent-friendly features, like the clear wetness indicator at the front of the nappy and the colour-coded fit guide, make it easy to know your baby's nappy size and when they need a nappy change.

   2025 February 13, Sarah Dawson, “Fred & Flo Cottony Soft Newborn Nappies: Review from a mum of two”, in Women’s Health, Hearst