The Monteverde USA® Core Collection, rich in color, vibrancy, and brilliant hues, is the central part and key to our ink story. Our fundamental collection of stunning fountain pen inks is available in a wide spectrum of nature-inspired colors, ranging from vibrant Caribbean Blue to bold Mandarin Orange. Each ink is carefully crafted for use in your favorite fountain pens using ITF™ technology; aiding in maintenance by improving ink flow and extending cap-off time, all the while lubricating your fountain pen feeding system.