We take most products for granted in the sense that they are contained in some kind of appropriate packaging ready to be used where and when that packaging is opened. We simply dispense or remove it from that packaging and then use it as one would expect – simple, uncomplicated and requires little, if any, thought.
However, not all products can be simply stored within primary and secondary packaging for long periods of time and under normal daily conditions and then removed and used ‘as is’. Take vaccines, for example – the refrigeration cold chain is vital to the integrity and efficacy of the formulation that is needed at the location and time of use as the complex proteins of viral vaccines can be easily denatured by raised temperatures. This is a classic case of unstable substances needing special treatment to maintain their efficacy.
This instability applies across many sectors, not least the personal care industry. Many actives, at least many of the ones with recognised efficacy, cannot be formulated into standard formulations, stored for extended periods ready for use and then deliver the efficacy the consumer expects. Formulating and packaging unstable personal care products such that the efficacy of the active(s) within those products is maintained or created at the time of use can take one of several forms; many of which have been borrowed from parallel industries.
Mixing components at the time of use
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