An in house consumer test was conducted to determine whether consumers can see a significant difference in vibrancy when asked to compare hair switches washed 40 times (equivalent to 12 weeks) with the TRESemmé Colour Revitalise shampoo and conditioner compared to non-conditioning shampoo.
Hair switches were washed 40 times and a paired comparison test with 24 panellists was run, showing each panellist 6 pairs of switches (total 144 assessments) and asking them to assess which had more vibrancy.
||TRESemmé Colour Revitalise Shampoo and Conditioner
After 40 washes consumers perceived the hair switches to have more vibrancy when washed with TRESemmé Colour Revitalise Shampoo & Conditioner compared to those washed with non-conditioning shampoo.
Equivalence to 12 weeks:
Kantar World Panel Data for UK females (12 month ending Dec 2017) shows an average of 2.9 washes per week.
The vibrancy data was collected after 40 wash cycles.
With an average of 2.9 washes per week making our 40 washes tested equivalent to 13.79 weeks.