XL Horticulture's new SunMaster Cool is the latest step forward in this ongoing process, being designed to keep hardy ornamental nursery stock cool in summer without reducing light transmission.
But this patented seven-layer polythene tunnel cover is also finding a role in the soft-fruit sector, where lower summer temperatures help in the scheduling of fruit harvesting.
SunMaster Cool incorporates a microfine aluminium infrared reflector, the result of eight years of research. It also boasts a patented new form of condensation prevention, described as "super-hydrophobic". This means that water droplets cannot settle on the surface of the film so they cannot drop onto the plants and so spread disease - a property that should last for the life of the film.
The super smooth external surface ensures dirt and dust are more easily washed away by the rain so the film stays cleaner for longer and retains its light transmission.
Lastly, the film keeps heat in as well as out, and early indications show that the higher autumn and winter temperatures it brings are increasing plant quality so that plants are ready for sale earlier in spring.
Yet SunMaster Cool costs no more than an ordinary thermic film, has a higher puncture resistance than any other film on the market, has a design life of 10 years and a warranted life of six years.
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