We are professional & responsible manufacturer of digital duplicator ink, master roll, and toner cartridge, We produce nearly all the series ink and master roll for use in Risograph, Gestetner, Ricoh, Duplo, Rongda digital duplicators, and all series of toner cartridges for use in hp, samsung, canon, ricoh, toshiba, konica minolta, kyocera mita, sharp, xerox, panasonic... We have professional Ph. D. team to control quality since 1999. Regarding ink and master, We use super purified water to make our ink by good designed equipments. We have our know- how to make ink and master rolls up to the standard.our products main features are as follows: 1.Environmental friendly. 2.Ink dry speed faster, No smudge while double sides printing, 3..Ink in good fluidity, never overflow from the drum. 4.Ink in stable quality , same expiry date as original one. More than 60 degree centigrade, it is still perfect, we sell our ink to the hot regions such as mid-east, South Asia, South Africa, South America countries for many years. less than -20 degree centigrade, it is also perfect. We shipped our ink and master rolls to the cold countries such as Russia, Ukraine, North American countries. 5.Ink is bright and shining like a mirror. 6.Master roll quality is very stable especially to the definition and printing quantities. 7.We are sure you will win more & more customers after you use our products.