526 JOURNAL OF THE SOCIETY OF COSMETIC CHEMISTS S__la_g e I Wox• Weigh Wox. 2, e• Weigh Sleom pon wiih mixer Slage lZ Meier I Mixing pan Figure 5 Preparation of intermediates--Method II

MODERN LIPSTICK BASE MANUFACTURE 527 degreasing plant is easily justifiable and considerably eases the operator's life. It also follows as a corollary that when such a plant is installed, any further equipment being contemplated should be critically examined to ensure that as many of its parts as possible can be cleaned in trichlorethy- lene. It is perhaps not surprising that such consideration can be a great morale booster on the factory floor. From the foregoing, it is now possible to develop a second method of manufacture which is faster and cleaner. Styage ]]Z J •'• I I •e'e• I I we'• I I •'• I I •e'• I I Premix pan I Sand mill Steam pan with mixer J Pump into troysJ Figure 6 Preparation of lipstick base--Method II