Iroko Can Hide Edge-Dulling Mineral Deposits

Iroko may contain hard calcium-carbonate deposits within its pores. These small mineral accumulations can unexpectedly dull cutting edges, even though the surrounding wood is only moderately hard.

Practical takeaway: If an Iroko blank suddenly begins cutting poorly, refresh the edge instead of increasing pressure. Light cuts with frequently sharpened tools reduce heat, torn grain and extra sanding.