Buyers should prioritize thickness tolerance (typically ±0.05mm to ±0.1mm) and surface hardness. Ensure the HPL meets the EN 438 standard, which classifies laminates based on resistance to abrasion, scratching, and impact. For commercial applications, look for Grade HGS (Horizontal General Purpose Standard) or Grade VGS (Vertical General Purpose Standard). Additionally, verify the density of the kraft paper core, as higher density ensures better structural integrity and cleaner edges during fabrication.