If the break results in one ore more flat surfaces, it demonstrates cleavage.
The more flat surfaces, the better, since you will be able to apply paint directly.
These units fill in topographic variations on a scale of 10's cm, producing a more uniformly flat surface on which the later tephra is deposited (variations between 10 and 20%).
From 1993, he reverted to more conventional flat surfaces, creating space through interleaving painted forms, but always demonstrating his extraordinarily astute use of colour.
Usually such an interface is more than a flat surface.
For instance, hummingbirds' long beaks and tongues can reach to the depths of cone-shaped flowers, whereas butterflies prefer flowers with more of a flat surface.
The two leading razor makers invest a small fortune in R&D, figuring out how to put more blades on every flat surface on the razor, adding battery-powered features and "track balls" to create the perfect "shave".
It can be seen that all these V2O5·x H2O nanorings have a perfect shape of complete rings with the smooth and flat surface (more nanorings and microloops are shown in Fig. 4).
When the inhibitor was added to that solution, the surface appeared more flat, homogeneous, and uniform, and the height scale of surface started to decrease.
Palm leaves, bamboo strips, and papyrus offered a flat surface that more readily accepted handwriting, and it was said that parchment came into use in Asia Minor after the export of papyrus from Egypt was banned.
