口紅生産工程の基本機能

―外観選別から基本機能評価へ―

抄録

In　this　paper,　the　optimization　on　the　generic　function　of　a　lipstick　manufacturing　process　is　discussed.　Traditionally,　the　quality　of　lipsticks　is　measured　by　objective　quality　characteristics　such as　appearance.　Sensory　tests,　which　are　not　recommended　in　quality　engineering,　had　been　used　to evaluate　such　quality　characteristics.　lt　is　because　these　quality　characteristics　are　not　stable　due　to the　changes　of　environ　mental　conditions　such　as　between　lot　variability　or　seasonal　variation. When　sucs　quality　problems　occur,　manufacturing　conditions　were　adjusted　from　time　to　time,which　is　known　as　fire　fighting　or　"mole　beating"　in　Japanese.　Among　those　objective　quality characteristics,　the　ones　such　as　scratches,　color　uniformity　or　breaking　during　usage　are　manu facturing　related　quality.　As　the　generic　function,　the　stress/strain　relationship　was　investigated and　the　results　showed　that　the　relationship　has　satisfied　the　Hooke's　Law　with　a　good　improvement.