Step 1: Understanding the Question:
"Seasoning" is the process of drying wood. "Refractoriness" refers to how difficult it is to dry the wood without it cracking, warping, or splitting.
Step 2: Detailed Explanation:
• Non-refractory Woods (C): These are woods that can be dried (seasoned) very rapidly under severe conditions without developing defects. They are usually low-density woods with uniform structure. Examples include Semul or Mango wood.
• Refractory Woods (D): These are difficult to season and develop cracks or splits if dried too quickly. They must be seasoned slowly under controlled conditions (e.g., Teak, Sal).
• Classification: This classification is critical for sawmill owners to decide how to operate their "kilns" (drying ovens). Non-refractory woods are the easiest and cheapest to process.
Step 3: Final Answer:
Woods that can withstand rapid seasoning are called non-refractory woods.