Efficient and Convenient Route for the Synthesis of Some New Antipyrinyl Monoazo Dyes: Application to Polyester Fibers and Biological Evaluation

Table 3

The recommended dyeing procedure.

Steps	Dyeing processes
1	Fill dyeing machine
2	Load fabric
3	Add to bath at 38°C
4	Run for 5 min
5	Add the dyes
6	Run for 5 min
7	Add in three parts over 20 min
8	Adjust pH to 3.5 to 4.0 with acetic acid
9	Raise to 121°C
10	Run for 1 h at 121°C
11	Cool to 66°C and sample; dye added should be run at least 1 h at 121°C to insure penetration
12	Cool to 49°C and drop bath
13	Rinse clear at 49–54°C
After scour
14	Set bath at 40°C with glacial acetic acid 0.5 g/L.
15	Raise to 82°C
16	Run for 15 min
17	Rinse clear at 40–54°C
18	Check for crocking, extract, and dry