For all nature projects, you will love this variety of Nature Reactive Inks from Hero Arts. These ink cubes measure 1.25" x 1.25". There are 4 colors in this pack, Root Beer, Green Apple, Key Lime Fizz, and Rog. This ink is a special formulation that reacts when spritzed with water to create a wide range of dramatic effects. This ink is quick-drying and water-based. This ink is great for layering and ink blending but works best with water techniques. This ink can also be heat embossed if you move quickly. You will love not only the bright colors in this pack but also the creative ways in which you can use this ink. This ink is made in the USA.