Decorative Cosmetic Products (Part 02) Flashcards
Three (3) Analysis of Cosmetic Products
- Physical Analysis
- Microbiological Analysis
- Chemical Analysis
Physical Tests for Powders
- Fineness of Powder
- Apparent Density
- Uniformity of Shade
- Odor
- Pressure Applied on Compact Powder
- Breaking Point
- Matter Insoluble in Water
- Moisture and Volatile Matter
- pH of Aqueous Solution
- Pay Off
Residue on __________ should be NMT 2% on 150 u NMT 0.5%.
75 u Sieve
Commonly, standard and sample are both placed between two glass plates and compared and observed in natural light.
Uniformity of Shade
Pressure Applied on Compact Powder by __________.
Penetrometer
Cake is dropped on wooden (__________) or thick rubber mat (__________).
8 to 10 in; 6 ft
Boil 1 gm with 200 mL water, filter, dry and check the residue.
Matter Insoluble in Water
By drying powder at 105 C to constant weight.
Moisture and Volatile Matter
Adhesion with the puff of compact or pressed powder should be tested on the skin.
Pay Off
Physical Tests for Lipsticks
- Melting Point Determination Test
- Breaking Load Point Test
- Determination of Thixotropic Character
- Test for Application Force
- Determination of Surface Characteristics
- Determination of Color Dispersion
The determination of melting point is done in order to determine the storage characteristics of the product. The inciting point of lipstick base should be between __________ in order to avoid the sensation of friction or dryness during the application. The method of determination is known as __________.
60°C to 65°C; Capillary Tube Method
This test is done in order to determine the strength and hardness of the lipstick. In this method, the lipstick is placed in horizontal position, 1 inch from the base and weights with increasing loads are attached to it.
Breaking Load Point Test
The lipstick is usually held horizontally or at an angle of __________ in the socket.
45°
This is the test for determining the uniformity in viscosity of base.
Determination of Thixotropic Character
A test to determine the force to be applied during application. In this method, two lipsticks are cut to obtain flat surfaces which are placed one above other. A smooth paper is placed between them which is attached to dynamometer to determine force required to pull the paper indicates the force application.
Test for Application Force
The study of surface property of the product is carried out in order to check the formation crystal on the surface or the contamination by microorganism or formation of wrinkles and the exudation of liquid.
Determination of Surface Characteristics
The test is done in order to determine the uniform dispersion of color particle. The size of the particle is determined by the microscopic studies and it should not be more than 50 u.
Determination of Color Dispersion
Four (4) Types of Microbiological Analysis
- Pour-Plate Technique
- Spread-Plate Technique
- Streak-Plate Technique
- Membrane Filtration Method
The sample should be diluted successively with sterile water. The agar medium is maintained in molten state at 45°C. 1 mL of diluted sample is added to sterile petri dish to which is then poured 9 mL of sterile, cool agar medium. The contents are thoroughly mixed and allowed to solidify. The dish is incubated at suitable temperature and conditions. After few days, different kinds of microbe grow as separate colonies.
Pour-Plate Technique
An aliquot of the diluted sample is placed to the agar surface and is spread uniformly with sterile bent rod. Incubate it at suitable temperature and condition. After few days, different kinds of microbes grow as separate colonies.
Spread-Plate Technique
