JOURNAL OF I'HE SOCIETY OF COSMETIC CHEMISTS 105 T•rx^x•v• Ev^i•u^x•o• M•'•or•s xs•'o Orr•c•^• PP, oc•:rmP,•:s We are planning to offer several tentative evaluation methods this fall. These tentative methods will be made available to all members of the SocxET¾ and those in charge of these test methods would like your criticisms --both constructive and destructive. After these tentative evaluation methods have been open to review by the SomET¾ for one year, we propose to offer them as "Official S.C.C. Methods" for evaluating cosmetic products. It is hoped that "Official Methods" will develop as tremendously improved, accurate methods that have been checked and rechecked in many separate laboratories. The Subcommittee has the initial problem of selecting properties that are important and that can be accurately measured. Initially we are working with established methods but we expect to develop new and special methods before long. Usually, coded samples are sent to all members of the Subcommittee to see what agreement (if any) is obtained among the com- mittee members using the suggested techniques. At least one committee has been working for nearly a year to develop a test method which will give the same values in the hands of several different investigators, and you will learn today of their experience. We have started with six important cosmetic products and five subcom- mittees to study them: Shampoos, Waving Lotions, Aerosols, Creams and Lotions, Deodorants and Antiperspirants. Each committee has considered what test methods show the most promise and are reporting to you. We are particularly encouraged by the assurance that several tentative test methods will be offered for general SocI•,¾ study this fall. What addi- tional products shall we tackle ? COMMENTS BY MORRIS J. ROOT M•,HoDs ^sD techniques have been developed for analyzing the spray characteristics of aerosol products. The characteristics of the spray which can be measured include these: I. Pressure II. Delivery Rate III. Spray Pattern (Particle Size) IV. Spray Angle. I. Pressure. The pressure in the container determines the forcefulhess of the spray and, therefore, is an important consideration in analyzing the spray. Furthermore, certain government regulations make it imperative that the pressure be measured by a standard technique. A tentative method for internal pressure determination of aerosol prod- ucts in lightweight metal containers has now been adopted by the Aerosol Division of the Chemical Specialties Manufacturers Association. This

JOURNAL OF I'HE SOCIETY OF COSMETIC CHEMISTS 105 T•rx^x•v• Ev^i•u^x•o• M•'•or•s xs•'o Orr•c•^• PP, oc•:rmP,•:s We are planning to offer several tentative evaluation methods this fall. These tentative methods will be made available to all members of the SocxET¾ and those in charge of these test methods would like your criticisms --both constructive and destructive. After these tentative evaluation methods have been open to review by the SomET¾ for one year, we propose to offer them as "Official S.C.C. Methods" for evaluating cosmetic products. It is hoped that "Official Methods" will develop as tremendously improved, accurate methods that have been checked and rechecked in many separate laboratories. The Subcommittee has the initial problem of selecting properties that are important and that can be accurately measured. Initially we are working with established methods but we expect to develop new and special methods before long. Usually, coded samples are sent to all members of the Subcommittee to see what agreement (if any) is obtained among the com- mittee members using the suggested techniques. At least one committee has been working for nearly a year to develop a test method which will give the same values in the hands of several different investigators, and you will learn today of their experience. We have started with six important cosmetic products and five subcom- mittees to study them: Shampoos, Waving Lotions, Aerosols, Creams and Lotions, Deodorants and Antiperspirants. Each committee has considered what test methods show the most promise and are reporting to you. We are particularly encouraged by the assurance that several tentative test methods will be offered for general SocI•,¾ study this fall. What addi- tional products shall we tackle ? COMMENTS BY MORRIS J. ROOT M•,HoDs ^sD techniques have been developed for analyzing the spray characteristics of aerosol products. The characteristics of the spray which can be measured include these: I. Pressure II. Delivery Rate III. Spray Pattern (Particle Size) IV. Spray Angle. I. Pressure. The pressure in the container determines the forcefulhess of the spray and, therefore, is an important consideration in analyzing the spray. Furthermore, certain government regulations make it imperative that the pressure be measured by a standard technique. A tentative method for internal pressure determination of aerosol prod- ucts in lightweight metal containers has now been adopted by the Aerosol Division of the Chemical Specialties Manufacturers Association. This