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BACKGROUND
Modern shampoos are prepared to provide sufficient cleansing action with adequate foam to remove solid particles from hair and scalp. In the above formulation soap formation occurs by saponification of free fatty acids of coconut oil with sodium hydroxide at 80°c. Propylene glycol acts as viscosity imparting agent where as sodium lauryl sulphate acts as a detergent and foaming agent.1
Aim: To prepare and evaluate 20gm of solid cream shampoo.
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REQUIREMENTS
Chemicals: Sodium lauryl sulphaate,
Coconut oil,
Propylene glycol,
Sodium hydroxide,
Stearic acid,
Perfume.
Apparatus: Beaker,
Motor and pestle,
Glass rod,
Weighing balance.
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PROCEDURE
Sodium laurye sulphate was pasted with suitable gilling agent i.e. stearic acid. Aqueous phase consists of sodium hydroxide, proplene glycol and water. Aqueous phase was then added to oil phase with continuous stirring to from paste like consistency. Finally add the color, perfume and pack it.
Formulation table
| Ingredients |
% w/w |
| Sodium lauryl sulphate |
20 |
| Coconut Oil |
1 |
| Propylene Glycol |
2 |
| Sodium hydroxide |
1 |
| Stearic acid | 5 |
| Perfume |
q.s |
| Water |
up to 100 |
Evaluation
-
Foam and foam stability
The Ross-Miles foam column test is accepted. 200 ml of water dropped into a glass column containing 50 ml of the same solution. The height of the foam generated is measured immediately and again after a specified time interval, and is considered proportional to the volume.
|
S. No |
Initial volume of shampoo |
Height of foam ( 0 min) |
Height of foam ( 5 min) |
Height of foam (10 min) |
Height of foam ( 15 min) |
|
1 |
|||||
|
2 |
|||||
|
3 |
-
Detergency and cleaning action
Cleansing power is evaluated by the method of Barnet and Powers. Place 5 gm sample of soiled human hair in 200 cc of water at 350 C containing of 1 gm of shampoo.
-
Shake the flask around 50 times a minute for 4 minutes. Then wash once again with sufficient amount of water, then filter the hair, dry it and take the weight.
-
Calculate the amount of soil removed.
|
S.No |
Weight of soil |
Weight of hair |
Total weight (Soil+Hair) |
Amount of shampoo |
Final weight of soil after cleaning |
|
1 |
|||||
|
2 |
|||||
|
3 |
-
Viscosity
Viscosity of the liquid shampoo is determined using a Brookefield viscometer. 100 ml of the shampoo is taken in a beaker and the spindle is dipped in it for about 5 min and then the reading is taken.
|
S.No. |
Volume of liquid shampoo (ml) |
Viscosity (cps) |
|
1 |
100 ml |
|
|
2 |
100 ml |
|
|
3 |
100 ml |
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CONCLUSION
Solid cream shampoo is prepared and evaluated.
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REFERENCES
- Mithal BM, Saha RN. A handbook of cosmetics, Vallabh Prakashan, New Delhi, 1st edition, 2010: 110-127.
