E Ink has launched Kaleido 4, its latest color e-paper technology, promising better color reproduction and faster refresh rates. This upgrade addresses previous limitations of Kaleido 3, which is used in devices like Kobo and Kindle Colorsoft. The new display is set to debut in Hanvon's M10C II tablet, available only in China. Kaleido 4 improves white reflectance and contrast, making text clearer and color images more vivid.