Fig. 4From: Surface free energy and dynamic wettability of wood simultaneously treated with acidic dye and flame retardantLOI of poplar wood veneers treated with dye and flame retardant: a untreated wood, b dyed wood veneer with BL-flame-retardant concentration of 0%, c dyed wood veneer with BL-flame-retardant concentration of 10%, d dyed wood veneer with BL-flame-retardant concentration of 20%, and e dyed wood veneer with BL-flame-retardant concentration of 30%Back to article page