Gina K. Designs -. Designs Ink Cubes are acid-free and PH-Neutral. They are convenient for travel and easy to store. They are an economic way to collect lots of colors and they coordinate with our exclusive card stock. This set includes Sweet Corn, Wild Lilac, Tomato Soup, Peach Bellini, Fresh Asparagus, Honey Mustard, Faded Brick, Blue Lagoon.