Diffusion controlled security tags
作者： Paul G. Seybold
DOI:
关键词: Chemistry 、 Evaporation 、 Diffusion 、 Solvent 、 Chemical engineering 、 Analytical chemistry 、 Product (mathematics)
摘要: A diffusion-controlled security tag comprising a carrier containing solution of compound which changes color upon diffusion or evaporation the solvent. Preferably is enveloped in barrier film controls rate diffusion/evaporation solvent from such that change indicates undesirable storage product tampering.
lens.org 参考文章(16)
Thomas Ian Bradshaw, Method and device for monitoring vapor concentration at a phase interface ,(1976)
Otto Atzrott, Wolfgang Sliwka, Heinz Hartmann, Non-smudging pressure-sensitive copying material ,(1974)
Edward F. Meyers, House plant water content indicator ,(1975)
Jorge M. Delatorre, Apparatus for visually indicating elapsed time by a color change ,(1976)
Fred R. Youngren, Shelf life indicator ,(1980)
Marjorie G Snelling, Dampness detecting and indicating device ,(1938)
Hoftiezer Henry, Richard A Line, Liquid phase water indicator ,(1955)
Howard A. Bohm, Harold G. Monsimer, Microcapsules containing medicament-polymer salt having a water-insoluble polymer sheath, their production and their use ,(1978)
Jr Charles J Smith, Method and reagent for determining moisture content of paper ,(1962)
Cole James Webb, Temperature time integrator ,(1946)