The Canon PFI-050 Y is a yellow pigment-based ink designed specifically for use with imagePROGRAF TC-20, TC-20M, TC-21, and TC-21M printers. This 70 ml refill bottle allows you to maintain your printer's output without frequent interruptions, providing a reliable supply of color for your technical documents and prints. Because the ink is pigment-based, your finished work gains a level of durability that makes it resistant to both water and highlighters. This ensures that your markings and colors remain crisp and clear even if the page is accidentally dampened or marked over during review, making it a practical choice for professionals who handle blueprints or detailed plans.