Table 4. The qualities of wood fiber and their dimension derivative values

Wood species	Fiber length (μm)	Derivative value of fiber dimension					Total score	Fiber quality grade
		Runkle ratio	Felting power	Muhlsteph ratio (%)	Flexibility ratio	Coefficient rigidity
Bruguiera gymnorhiza	1,405.51	1.03	50.79	75.75	0.49	0.25
Score	50	0	50	25	25	25	175	III
Hibiscus tiliaceus	1,373.49	0.41	48.78	49.69	0.7	0.14
Score	50	50	25	50	50	50	275	II
Avicennia alba	1,357.12	0.76	53.4	68.56	0.56	0.21
Score	50	25	50	25	50	25	225	II
Bruguiera cylindrica	1,353.4	1.19	51.18	79.29	0.45	0.27
Score	50	0	50	25	25	25	175	III
Sonneratia ovata	927.82	0.65	34.86	63.58	0.6	0.19
Score	25	25	25	25	50	25	175	III
Sonneratia caseolaris	1,004	0.47	34.2	53.81	0.67	0.16
Score	50	50	25	50	50	25	250	II
Excoecaria agallocha	966.57	0.42	34.29	50.57	0.7	0.14
Score	25	50	25	50	50	50	250	II