In various industries, the purpose of a wood finish is to protect the surface from various types of damage such as chemical, mechanical or biological and/or provide a specific visual aesthetic.
Quantifying surface characteristics of their wood finishes is important to both manufacturers and buyers, and can play a significant part in the quality control or optimization of finishing processes for wood. This article will explore the various surface features that can be quantified using a Nanovea 3D Non-Contact Profilometer.
Importance of Profiling Wood Finishes
All wood surfaces possess a measure of roughness and texture, and it can is essential to be able to quantify this in order to ensure it can meet the requirements of its application. Optimizing the finishing process or determining the quality of wooden surfaces based on a quantifiable, repeatable and reliable surface inspection method would let manufacturers design and implement new controlled surface treatments and give buyers the ability to inspect and select suitable wood materials.
High Speed Inspection and Precision Flatness Measure
Precision Flatness Measurement
Rigid and Stable Structure
This study used the high-speed Nanovea HS2000 platform equipped with a non-contact profiling line sensor to analyze and compare the surface finish of three separate flooring samples: Antique Birch Hardwood, Courtship Grey Oak, and Santos Mahogany flooring. This showcased for the capability of the Nanovea Non-Contact Profilometer to deliver both speed and precision when measuring different examples of surface areas and comprehensive in-depth analysis of the scans.
Table 1: Test parameters for individual pro_lometry measurements on Antique Birch Hardwood, Courtship Grey Oak and Santos Mahogany wood samples.
|Optical Sensor Height Range (μm)
|Scan size (mm)
||100 mm x 80 mm
|Step size (μm)
||100 μm x 10 μm
|Scan time (h:m:s)
Samples of wood tested
The Courtship Grey Oak and Santos Mahogany samples are laminate flooring types. Courtship Grey Oak is a low gloss, textured slate gray color with an EIR finish. Santos Mahogany is a high gloss, dark burgundy sample that was prefinished. Antique Birch Hardwood has an aluminum oxide finish, consisting of 7 layers to provide everyday wear and tear protection.
The individual scans of the three flooring sample can be observed below.
Figure 1: False color view of A) Antique Birch Hardwood B) Courtship Grey Oak C) Santos Mahogany (left to right)
Antique Birch Hardwood
Figure 3: 3D view for Sample Antique Birch Hardwood
Figure 4: Pro_le extraction and height parameters for Sample Antique Birch Hardwood
Courtship Grey Oak
Figure 6: 3D view for Sample Courtship Grey Oak
Figure 7: Pro_le extraction and height parameters for Courtship Grey Oak
Figure 8: Slices Analysis for Sample Courtship Grey Oak
Figure 10: 3D view for Sample Santos Mahogany
Figure 11: Pro_le extraction and height parameters for Sample Santos Mahogany
There is a clear distinction between all the samples’ Sa value. The lowest Sa value, and therefore the smoothest material, was Antique Birch Hardwood with a Sa of 1.716 µm. This was followed by Santos Mahogany with a Sa of 2.388 µm, with the Courtship Grey Oak showing a significantly higher value with a Sa of 11.17 µm. Other common roughness values that are useful in assessing the roughness of specific profiles along the surface are P-values and R-values. The texture of the Courtship Grey Oak is coarse and has a large number of crack-like features along the wood’s cellular and fiber direction.
Additional analysis was done on the Courtship Grey Oak sample due to its textured surface. On the Courtship Grey Oak sample, slices were used to separate and calculate the depth and volume of the cracks from the flatter uniform surface.
This article has shown how the Nanovea HS2000 high speed profilometer can be used for the inspection of the surface finish of wood samples, and does so in an effective and efficient manner. Surface finish measurements can be important to both manufacturers and consumers of hard wood flooring in understanding how they can improve a manufacturing process or choose the appropriate product that performs best for a particular application.
This information has been sourced, reviewed and adapted from materials provided by Nanovea.
For more information on this source, please visit Nanovea.