Table 3.
pH of each dyeing process

Type of dye	pH
	Water	Na2SO4		Na2CO3		Soaping	Fixing
		1st	2nd	Amount (g/L)	pH
Red H-E3B, Red RB 133%	4.4	4.3	4.4	0	4.5	9.8	8.1
				2	9.5
				5	10.2
				10	10.5
				20	10.8