"reduce the weight of" is correct and usable in written English.
You could use it when referring to reducing the physical weight, or burden of something. For example, "We are looking for ways to reduce the weight of our backpacks so that we can travel more comfortably."
One conclusion from this broader study is that pricing does reduce the weight of rubbish but not by much.
He wanted to shrink the size of government, reduce the weight of taxes and disentangle America from unnecessary foreign involvement.
In response, Muḥammad ibn Tughluq attempted to reduce the weight of his coins and experimented with token money.
Overmodification leads to malting loss, in which rootlet growth and plant respiration reduce the weight of the grain.
But it hopes that its huge investments in energy will gradually reduce the weight of financial services, while providing a steady source of growth.
In order to reduce the weight of a weapon, its recoil energy has to be reduced, but reducing recoil also affects the killing power of the bullet.
"The term New Fresco refers to a special composition of expansion materials I developed to reduce the weight of my fresco paintings, and to eliminate any cracking or adhesion problems".
Some experts hope a stricter standard on light trucks will induce the auto companies to reduce the weight of those vehicles, reducing the disparity among vehicles on the road.
Dennis interviewed a group of pregnant teenagers who were concerned about their first experience of childbirth, and were smoking in the hope it would reduce the weight of their babies.
Dr. Varshneya then helped the maker of a standard sniper rifle, the Iron Brigade Armory, a closely held company in Jacksonville, N.C., reduce the weight of its XM-3 rifle.
By 2020 the company aims to reduce the weight of packaging by one third through lighter materials, optimising structural and material design, developing more concentrated products and eliminating unnecessary packaging.
