Toner shine babban abin da ake amfani dashi a cikin ayyukan haɓakawa na lantarki kamar na'urar kwafin lantarki da firintocin laser. Ya ƙunshi guduro, pigment, additives da sauran sinadaran. Sarrafa shi da shirye-shiryensa sun haɗa da sarrafawa mai kyau, sinadarai, kayan haɗaka da sauran fannoni, kuma an gane shi azaman babban samfuri a duniya. Tun zuwan fasahar kwafin electrostatic, tare da saurin bunƙasa fasahar bayanai da sarrafa kansa na ofis, ɗimbin firintocin Laser da masu kwafin lantarki sun buƙaci kwafin hoto don samun ƙuduri mafi girma da ƙimar ci gaba mai dacewa. Toner yana buƙatar samun kyakkyawan siffar barbashi, girman barbashi mai kyau, kunkuntar girman girman barbashi, da kaddarorin caji masu dacewa.

Cancantan toner yana buƙatar biyan buƙatu masu zuwa:

1. Wajibi ne don hana ƙazanta daga gurɓata toner, tsarin ci gaba na electrostatic yana da manyan buƙatu don toner, kuma ƙazantattun da aka haɗe a cikin toner za su lalata ingancin hoto kai tsaye.

2. A karo da gogayya tsakanin toner barbashi da kuma tsakanin barbashi da bango zai haifar da wani karfi electrostatic sakamako, da electrostatic sabon abu zai shafi aminci aiki a lokacin da yake da tsanani, kuma ko da haifar da mafi tsanani sakamakon, da kuma zama dole anti- ya kamata a yi la'akari da matakan tsaye.

3. Toner yana da mannewa, tarawa na dogon lokaci ba makawa zai shafi aikin al'ada mai santsi, har ma ya kai ga kunkuntar ko ma katange nassi, matakan tsaftacewa masu mahimmanci.

4. Toner shine mafi yawan kwayoyin halitta, akwai yuwuwar da kuma ɓoye haɗarin fashewar ƙura, wanda bai kamata a ɗauka da sauƙi ba.