hongsam's pigment ink which has good lightfastness and waterproof is made of the finest pigment in the world. it has the following advantages: 1.finest particle. the pigment particle which is 90-200 nano go through the 0.22 micron filter, has no possibility of head blocked. 2. it is well known that infusible pigment has high-level lightfastness which dye-based ink can not compare with it. the printing work fo hongsam pigment ink has good performance of black and color. 3. hongsam ink has the special surface tense which guarantee smoothly printing and trim edge of the character or words. no spreading and sinking in the paper. the effect of the printing work has no differences from the printing work of laser printer. 4. particular prescription, stable ink system. no deterioration, no deposition. the ink can be kept over two years. 5. carbolic black has the best anti-uv and light visibility in all the pigment. the printing work and file can be kept about 100 years. no fading over time. 6. true color performance of color pigment ink it can be used in the following field: 1. filling oem cartridges of epson, lexmark, hp, canon etc. improve your products grade. 2.specially introduce to print wedding photo. the photo will be new all the time and color will not be fade over time. 3. for the use of printing and keeping important document, file, account file etc. 4 special use of other field which demand good lightfastness and waterproof. 5.pigment ink for outdoor thermal large printer with high lightfastness for hp 100/120/500/800/750/5000/5500, novajet, kodak etc supply the packing of 25ml/120ml/400ml/500ml/1000ml/20kg etc, or at your request.