industrial chemistry

1. EVALUATION OF SHAMPOO

2.  Foam and foam stability
 Detergency and cleaning
action
 Effect of water hardness
 Surface Tension and wetting
 Surfactant content and
analysis
 Rinsing
 Conditioning action
 Softness
 Luster
 Lubricity
 Body, texture
 Irritation and toxicity
 Dandruff control
 Eye irritancy test

3. Ross‐Miles foam column test
200ml of surfactant solution is dropped into a
glass column containing 50ml of the same
solution.
The height of the foam measured
(proportional to the volume)
Lather meter
“Barnett and Powers”
water hardness, type of soil and quantity of
soil effects on foam speed, volume and
stability

4. • 5gm sample of soiled human hair is placed at 35°c in
200cc of water containing of 1gm of shampoo
• The flask is shaken 50 times a minute for
4minutes.Then washed once again with sufficient
amount of water, then after filter the hair, dry and
weigh
• amount of soil removed under these condition is
calculated

5. Canvas disk sinking test
Vernon cotton duck#6
canvas disk 1 inch in diameter
is floated on the surface of a solution,
time required for it to sink is measured
accurately

6. • Skilled beauticians
• judged by shampoo user
• a lustrous look, softness and hair
is easily styled

7.  dropping 0.1 ml of liquid shampoo in the conjunctiv
al sac of one eye
of the rabbit
 Three groups of animals
 24, 48 and 72 hr. and four and
seven days

8. Brooke field viscometer
 100 mL
of the shampoo is taken in a beaker
 spindle is dipped in it
for about 5 mins
 reading