Table 2.

UPF values, protection class and K/S values of plain weave fabric dyed with natural colorants at different concentrations

	Colorant	UPF	UV Protection Class	K/S
Plain weave	2% Madder	11.1	No Class	0.20
	4% Madder	15.8	Good	0.28
	6% Madder	16.6	Good	0.38
	2% Cochineal	28.5	Very Good	0.63
	4% Cochineal	34	Very Good	0.79
	6% Cochineal	36.6	Very Good	0.99
	2% Indigo	43.1	Excellent	1.78
	4% Indigo	> 50	Excellent	2.56
	6% Indigo	> 50	Excellent	3.02