The tendency for the stick
Friday, May 7, 2010 | 1:15 amMBTs The base material is heated in a steam-jacketed kettle to 90°C and the ground colorants are added to the base material in the kettle. The batch is stirred with a high speed mixer for several hours. Any adjustment in shade is made by using the ground colorants. mbt shoes Base material is added in proportion to the amount of colorant used in the correction to keep the consistency approximately equal to that in the original formulation.
When the color match is satisfactory, the lipstick mass is drawn from the kettle and passed through a 74-pm (200-mesh) stainless steel screen. mbt discount It is collected in a molding pan and slabbed for future molding. Prior to molding, the mass is melted with slow agitation in a melting kettle to remove entrapped air.
Temperature control is important throughout processing, with care being taken to avoid excessive temperature in the kettle. The warmed lipstick mass is poured into warm molds, vibram five fingers and the molds are passed through a cooling chamber. When cool, the lipsticks are removed from the molds, inserted In the lipstick holders, and flamed by passing them rapidly through a bunscn gas flaine. vibram fivefingersThey are then ready for packaging and distribution.
Manufacturing control begins with a thorough check of raw materials. A test of heat resistance of the finished product is made by holding it for 24 h in a constant temperature box at a temperature of 55°C, to determine any tendency to droop or distort. fivefingers shoes Hardness may be tested using a penetrometer.
The tendency for the stick to sweat or bleed can be checked by putting filled lipstick containers in a desiccator containing water and kept at a constant temperature of 45°C.
Shade and intensity of stain are best judged on the skin by comparison with the standard. Skin tone and undertone are also checked on the skin. reebok easytone Mass tone is judged by comparison with a standard.
Dow corning describes lipsticks containing alkylmethylsiloxancs. in addition to castor oil, as an emollient, a wax, a suspending agent, a coloring agent and an organsilicone compound (Formula 1). vibram five finger Shiseido describes a water-in-oil lipstick formulation containing a swellable clay mineral treated with a quaternary ammonium cationic surfactant The product covers the lips smoothly and provides a long- lasting moisturizing effect as well as long-lasting color. A modified clay dispersion is first prepared by treating magnesium aluminium silicate with benzyl-dimethylstearyl five fingers ammonium chloride and adding hydrogen- ated lecithin, water (aqua) and glycerin. This mixture is then added to a typical lipstick mass to form a w/o emulsion stick (Formula 2).
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