The statement was:
'Hydrolysed Wheat Protein (J Cosmet Sci pp 193-203, 2000)
Time required for penetration: 30 minutes at 35°C for initial detection, 16 hours (overnight simulation) for maximum detection'
Let me clarify:
Science Lesson: Quantity and Quality
In science there are two key observations that you have to pay attention to
Quantity - This is where you can measure an amount reliably. For example, with hair conditioning and deep conditioning, you can reliably find that after 20-30 minutes, hair simply does not deposit anything further onto its surface and after 20-30 minutes no further penetration is taking place either. This is a measured result where you can quantify how much of the conditioner is stuck on to the surface of hair firmly enough not to be washed off. Equally no more conditioner is being taken up by the hair.
Quality - This is not a measurable quantity. It is purely an observation. For example with protein conditioning, after 30 minutes you find most of the protein on the surface. At 16 hours, it is distributed further into the hair shaft. Now this does not mean more time allows more conditioner to penetrate. This is not supported by the previous quantifiable result. It is more likely meaning that the conditioner gets redistributed and penetrates further depending on how damaged the hair is (more pores, more entry).
|Protein conditioning and time : Note that there is no more uptake after 30 min, just a redistribution|
For budding scientists, look up quantitative and qualitative results. Coming up Next - What goes in must come out.