A sampler for delivery of microencapsulated liquid fragrance material is provided that comprises at least one treated paper sheet defining an enclosed cavity. The paper sheet is at least partially treated with a volatile containment treatment, wherein the volatile liquid containment treatment is water-stable...http://www.google.com.tw/patents/US5609710?utm_source=gb-gplus-share專利 US5609710 - Reduced odor fragrance sampler
