Toner, izwi kandi nka toner, ni ifu yifu ikoreshwa mumashini ya laser kugirango ishusho ihuze impapuro. Ifu ya silinderi ya kopi igizwe na resin ihuza, umukara wa karubone, umukozi ushinzwe kugenzura ibintu, inyongeramusaruro zo hanze nibindi bice. Ibara rya toner naryo rikeneye kongeramo pigment yandi mabara. Iyo toner icapwe, kubera monomer isigaye muri resin ihindagurika nubushyuhe, bizatanga impumuro mbi, bityo amahame yigihugu hamwe ninganda zinganda zibuza TVOC ya toner. Igihe cyose rero uguze printer cyangwa toner cartridge yujuje ubuziranenge, ntuzatanga imyuka mibi yo gucapa.

Uburyo bwa Polymerisation ni tekinoroji nziza ya tonier ya chimique, ikubiyemo (guhagarika polymerisation ihagarikwa, polymerisiyasi ya emulsiyo, gupakira microcapsules, dispersion polymerisation, compression polymerisation, ifu yimiti. Uburyo bwa polymerisation bwarangiye mugice cyamazi kugirango butange toner hamwe nubushyuhe buke bwo gushonga, bushobora byujuje ibisabwa byikoranabuhanga rigezweho mu kubungabunga ingufu no kurengera ibidukikije Mu guhindura igipimo cyo gutatanya, gukurura umuvuduko, igihe cya polymerisation no kwibanda ku gisubizo, ingano ya toner igenzurwa kugirango igere ku kintu kimwe, ibara ryiza no gukorera mu mucyo polymerisiyasi ifite imiterere myiza yingirakamaro, ingano yingirakamaro, gukwirakwiza ingano ntoya no kugenda neza.