Product Name: Compatible Premium Refillable Toner Cartridge Gpr23 C-Exv21 Npg35 Color Copier Toner IR C2550 C2880 C3080 C3380 C3480 for Canon Irc3380 Model NO.: GPR23 C-EXV21 NPG35 color copier toner Combination: One Set: Cmyk Specie: Bulk Toner Powder Is Available Feature: Compatible For Printer Brand: Canon Toner Powder: Japan Cartridge: 100% Brand New Color: Cmyk: Cyan/Magenta/Yellow/Black Version: Universal Advantage: Factory Price with Premium Quality Delivery Time: 3-7 Working Days After Received Payment Certifications: SGS Net Weight: Bk:570g/Cmy:260g for Use in: Canon IR C2550 C2880 C3080 C3380 C3480 Trademark: DORIS Transport Package: Neutral English Packing and Customized Packing Origin: China HS Code: 3707902000 Product Description DORISHow to judge premium color tonerFactorPerformanceColorHuecolor consistencySaturatevivid, clearBrightvery shiningBlackness & Chromaideal value controlled around 1.48Bottom ashideal value controlled around 0.05-0.06, above 0.06, the printing will be not clear.Defective ratenormal range between 5%-7%, beyond this range, this toner particles may become waste power, on the one hand, reduce printing pages, on the other, shorten the developer life time.DPIif low resolution, the printing quanlity will be not clear, bad appearance.Fixingfixing fastness standard above 90%Ghostingdouble image is affected by conductivity and print medium