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2. Janka hardness test - Wikipedia

   en.wikipedia.org/wiki/Janka_hardness_test

   For hardwood flooring, the test usually requires an 80 mm × 150 mm (3 in × 6 in) sample with a thickness of at least 6–8 mm, and the most commonly used test is the ASTM D1037. When testing wood in lumber form, the Janka test is always carried out on wood from the tree trunk (known as the heartwood), and the standard sample (according to ...

3. Wood flooring - Wikipedia

   en.wikipedia.org/wiki/Wood_flooring

   Wood flooring is any product manufactured from timber that is designed for use as flooring, either structural or aesthetic. Wood is a common choice as a flooring material and can come in various styles, colors, cuts, and species. Bamboo flooring is often considered a form of wood flooring, although it is made from bamboo rather than timber. [1]

4. Wood - Wikipedia

   en.wikipedia.org/wiki/Wood

   The wood from conifers (e.g. pine) is called softwood, and the wood from dicotyledons (usually broad-leaved trees, e.g. oak) is called hardwood. These names are a bit misleading, as hardwoods are not necessarily hard, and softwoods are not necessarily soft.

5. Hardwood - Wikipedia

   en.wikipedia.org/wiki/Hardwood

   This makes the denser hardwoods like oak, cherry, and apple more suited for camp fires, cooking fires, and smoking meat, as they tend to burn hotter and longer than softwoods like pine or cedar whose low-density construction and highly-flammable pitch make them burn quickly and without producing quite as much heat. [citation needed]

6. Heart pine - Wikipedia

   en.wikipedia.org/wiki/Heart_pine

   Before 1900 it was a source for poles, pilings, posts, sawlogs, flooring, plywood, pulpwood and naval stores (tapped for turpentine). [ 4 ] Currently heart pine for building and woodworking is procured by reclaiming old lumber and recovering logs, felled pre-1900, from rivers.

7. Ammonia fuming - Wikipedia

   en.wikipedia.org/wiki/Ammonia_fuming

   The process is usually applied to white oak, as this wood has a high tannin content. Red oak may turn greenish rather than deep brown. Other species may not darken as noticeably as white oak, depending on the tannin content. The effect of fuming can be enhanced in non-tannic woods by applying a coat of tannic acid to the surface before fuming. [5]