Shampoo Standards Essay

1000 Words4 Pages
Shampoo standards On the bottle of this new shampoo bottle it gives a statistic that 90% of users agree that their hair feels less greasy after using this new brand. However, as it says on the customer survey 73 out of 82 people who responded agreed with the claims that it makes their hair less greasy. Therefore, the statistic that 90% of users agree is true even though it is not completely accurate, the accurate percentage would be 89% so the statistic on the bottle has been rounded to the nearest 10. This piece of evidence is from a secondary source. Maths skills could be used for this evidence to work out the percentages. This new shampoos also claims it is pH neutral. Scientists carried out tests on the shampoo; the results showed that its average pH number was 7.4; this means the shampoo is primarily neutral although it is slightly alkaline. On the bottle it says it is ‘pH neutral – the same as the leading brand’ however, it is not the same as the leading brand because, as shown on the results table, shampoo C (the leading brand) had a pH number of 6.6. This means that the leading brand is slightly acidic, where as the new shampoo is slightly alkaline. This piece of evidence is from a secondary source. This piece of evidence is from a secondary source. Scientist specialised in chemistry areas will have contributed to this piece of evidence. The skills of understanding acids and alkalis could be used. Since the shampoo is slightly alkaline it could damage and weaken the hair, even though it is only slightly alkaline and would not damage the hair as much, after several washes hair could weaken. Some evidence for this is in the dermatology report where it says ‘recommended that shampoo is thoroughly rinsed out of hair to prevent prolonged exposure’. Despite this, hair experts claim that slight alkalis are good soaps according to hair experts because

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