Epson Sure Color P900 Yellow UltraChrome PRO10 Ink Cartridge 50ml - T46Y400 P-Series it is also pH buffered

it is also pH buffered with calcium carbonate for a true archival paper

Epson Light Magenta Ultrachrome K3 Ink Cartridge - 220 ml - T603C

Epson Pro 4880

High-Capacity ink system for low printing costs

Epson Surecolor P9570

Epson Sure Color P900 Yellow UltraChrome PRO10 Ink Cartridge 50ml - T46Y400 P-Series it is also pH buffered10 colour archival pigment ink with an expanded colour gamut. Introducing innovative UltraChrome PRO10 Inka breakthrough in professional imaging ink technology, only from Epson. Designed for the worlds greatest artists and photographers, this all new, premium ink adds Violet to produce a wider colour gamut1, delivering vibrant, lasting prints that captivate and inspire. 1 Versus previous generation UltraChrome HD Ink.