CTC (crush-tear-curl) tea is tea that has been produced by a modern, mechanical process that tears the leaf in order to induce oxidation, rather than manually rolling it to bruise the leaf, as in the production of orthodox tea. Because the CTC process breaks the leaf, there is no whole-leaf CTC tea, and thus CTC tea is divided into broken-leaf, fannings, and dust. CTC tea grades include, for broken leaf tea, BP, BOP, BPS, BP1, and FP, and for fannings, OF, PF, and BOPF. There are a myriad of grades for CTC dust.
