In　an　attempt　to　explore　the　nature　and　structure　of　colloidal　liquid　aphrons　(CLA),　the　formation　and　stability　of　CLA　composed　of　polyoxyethylene　3　dodecyl　ether　(AEO-3)/n-decane/sodium　dodecyl　sulphate　(SDS)/water　were　investigated　using　the　conductivity　technique　and　microscopic　observations.　The　formation　mechanism　and　the　stability　behavior　of　CLA　were　derived　from　the　conductivity　profiles　and　verified　by　the　optical　micrographs.　It　was　found　that　the　formation　was　a　low-energy　emulsification　process　including　a　foaming　stage　and　then　the　exchange　of　the　gas　for　oil　phase.　No　phase　inversion　took　place　during　the　whole　formation　process,　hence　the　CLA　represented　O/W　emulsion　type.　The　stability　behavior　determined　by　conductivity　analysis　was　described　using　linear　equation　at　303.15　K.　As　the　temperature　is　above　318.15　K,　the　conductivity　profiles　of　CLA,　which　presents　a　different　kinetics　from　the　first　order　model,　conformed　to　the　sigmoidal　equation　sigma(t)　=　sigma(1)-sigma(2)/1+e((t-t0)/S)+sigma(2),　where　sigma(t)　refers　to　the　conductivity　at　time　t,　sigma(1)　and　sigma(2)　refer　to　the　minimum　and　maximum　conductivity　during　storage,　respectively,　to　is　the　time