How to judge the quality of solid wood multilayer engineered hardwood flooring based on color difference We can see that many solid wood floors on the market have significant color differences. Solid wood flooring has color differences, so when purchasing solid wood flooring during decoration, the quality of the solid wood flooring must be judged based on the depth of …

Janka HardnessThe Janka scale is used to determine the relative hardness of particular domestic or exotic wood species. The Janka test measures the amount of force required to embed a 0.444″ steel ball into the wood to half of its diameter. Woods with a higher rating are harder than woods with a lower rating. The scale used in the table …

https://apawood-europe.org/official-guidelines-3/individual-standards/en-636/ This gives the requirements for plywood for general purpose use and for structural (load bearing) applications in dry, humid and exterior conditions. It also gives a classification based on bending properties. Amendment 1 : 2015 makes the following modifications to EN 636 : 2012 a) The scope now clarifies that the standard includes overlaid and coated plywood, but it …