It says the way to reduce paper use lies in cutting consumption in industrialised countries, improving papermaking efficiency, and using more recycled paper and materials other than wood in manufacture.
To manufacture the tests, a scientist feeds a sheet of chromatography paper into a generic Xerox office printer, which prints a layer of colored wax onto the paper.
There is almost as much statistical noise in the wettability of the paper and the leaf from one bag to the next as there is in dissolution rates, and small changes in manufacture usually matter more than anything the consumer on the teabag side can control.