SOCIETY OF COSMETIC CHEMISTS OF GREAT BRITAIN 71 President: Dr. L. W. Masch, Hamburg. Secretary: Dr. H. Neugebauer, Baden-Baden. Treasurer: Dr. F. Keil, Hamburg. I understand from Dr. Masch that they are anxious to hold a scientific meeting either by themselves or in co-operation with other International Cosmetic Societies, and that they are ambitious enough to think of a month in the middle of 1958. If this comes about, our own Society will be asked to support the meeting and, if possible, to supply at least one lecturer. At the time of writing (mid-November), the German Society has just on forty members, a number which they hope to double by the middle of next year. On behalf of the Society, I take this opportunity of wishing them all success in their new venture. J.' PICKTHALL, President. SOCIETY OF COSMETIC CHEMISTS OF GREAT BRITAIN THIRD YEAR DIPLOMA EXAMINATION PA PER ON'E THIS EXAMINATION was held at Acton Technical College on Monday, June 24th, and Wednesday, June 26th, 1957, two papers being set. Candidates must answer Question 1 and any FOUR other questions. Do not attempt to answer more than five questions, including Question 1. Candidates should commence each question on a separate sheet of paper. 1. What use is made of the following substances in toilet and cosmetic formulations: (a) Caustic Soda. (b) Caustic Potash. (c) Borax. (d) Triethan- olamine. 2. An approximately neutral sorbitan monolaurate has the following characteristics: Saponification value 175. Hydroxyl value 340. A condensation product with ethylene oxide made from it has the following characteristics: Saponification value 70. Hydroxyl value 135. What is the approximate percentage by weight of ethylene •xide in the condensation product ? What is the object of condensing with ethylene oxide ? 3. What precautions are necessary in preparing a clear lotion ? Refer in your answer to different types of clear lotion.

72 JOURNAL OF THE SOCIETY OF COSMETIC CHEMISTS 4. What are the three main classes of products for the artificial colouring of hair ? Discuss the preferred uses for each type. 5. What is meant by allergy ? Discuss the possible dangers of cosmetics. 6. (a) Name bacteria which are commonly present on the normal skin and scalp. (b) Describe a method of isolating these bacteria from a human subject. 7. Mention six ways in which vegetative bacteria may be killed, and write a short note on each. 8. Describe the two-phase aerosol system using a hair lacquer based on shellac and packed in a metal container as your example. Include a description of the conditions existing in the container before pressing the button and while the button is depressed. 9. In how many ways could you pack a liquid or cream shampoo ? Discuss the advantages and disadvantages of each type of pack. PAPER TWO Candidates should anwer any FIVE questions. Do not attempt to answer more than five questions. Candidates should commence each question on a separate sheet of paper. 1. What are the basic requirements for a good nail lacquer ? 2. A cold permanent waving lotion has been titrated for its content of (a) thioglycollic acid and (b) free ammonia. The results of the titrations were as follows: (a) 2 ml. of the lotion were equivalent to 16.3 mi. N--iodine solution. 10 (b) 10 mi. of the lotion were equivalent to 18.0 mi. N sulphuric acid. 1 . Calculate the percentage contents of thioglycollic acid and free ammonia respectively in the lotion, and comment on these results. Give a description of the raw materials used in the manufacture of (a) toilet soap (b) liquid soap. There are three main classes of surface-active agents. Give an example of each, together with a practical use in cosmetic formulation. Discuss the function(s) of the following substances in products for oral hygiene: Precipitated calcium carbonate sodium alginate sodium perborate sodium silicate urea and diammonium phosphate sodium lauryl sulphate.