how to refill samsung toner cartridge

{"title":"SCX 4520 refill black toner cartridge for Samsung printer SCX4520\/4720","imgUrl":"https:\/\/img.chinax.com\/nimg\/57\/be\/8fbc9d463a4104dc2ac725554eff-200x200-1.jpg","attrs":{"Price":"Negotiable","Brand Name":"OneFuJI","Model Number":"SCX4520","Minimum Order Quantity":"100","Delivery Time":"5-8 working days","Certification":"ISO9001 14001","Place of Origin":"China","Payment Terms":"Western Union, T\/T, L\/C, MoneyGram,Paypal","Supply Ability":"50000\/Month","Packaging Details":"foam+brown box","Type":"Toner Cartridge","Quality":"High Quality","Compatible":"For Samsung","Material":"From Japan","Advantage":"Factory direct sales"}}