In this study, manufacturing equipments for urushiol free raw rhus verniciflua stem(RRVS) extracts are developed which do not need for drying process and high pressure device. The three layered pressure tank and heating medium oil boiler are designed which are more efficient than the conventional ones, and the safety of the tank is assured by the structural analysis software. Finally, the RRVS extracts are prepared by water extraction technique at 100℃ using the developed equipments. In the physicochemical experiments for the RRVS extracts, an allergen such as urushiol is not detected, whereas the antioxidant such as polyphenol and flavonoid are contained.

• 신준(Member, Gangneung-wonju National University, Mechanical & Biomedical Eng.) | Joon Shin Corresponding author
• 이태연(Gangneung-wonju National University, Mechanical & Biomedical Eng.) | Tae-Yeon Lee