Teabag of twinned sachets of tea makes sachets of filter paper perforated by water jet to give specified pore size and number to infuse coarse leaf tea contents.

摘要

Both the sachets (2,3) are made of wide-pore filter material (10) having 20-30 pores per cm2 of size 1 mm2 perforated by water jet. The pore size can vary between top (7) and bottom (4) of the sachet, the filter paper weighing 8-18 g/m2. The tea substance to be brewed (13) comes in preferred coarse leaf form, leaf size 4-8 mm.