Almonds are available in many forms, such as whole, sliced (flaked, slivered), and as flour. The flaked guar split is ground and then dried. Prismatic blades are flaked from stone cores through pressure flaking or direct percussion. The scales flaked off from the bulbs are used, usually steamed. The Kelloggs pioneered the process of making flaked cereal. Will Kellogg continued to develop and market flaked cereal. The advent of lightweight flaked cereals increased the use of cardboard boxes. Tuna may be processed and labeled as "solid", "chunked" ("chunk") or "flaked". Archaeologists and anthropologists use surviving crafted lithic flaked tools to classify cultural periods. In its flaked form, it can be used similarly to ground meat. The flesh is fine flaked and medium firm. Within three months the paint had almost completely flaked off. Heating changes the stone structure making it more easily flaked. The scales are vertically arranged and can be flaked off easily. If patination has flaked off, repatination may be recommended.