Bobbin yarn sample machine
Undyed cheese yarn treated before finishing
Various auxiliaries for normal dyeing Dyes for dyeing Leveling agent to be tested Experimental methods
In the dyeing process, the bobbin yarn dyeing machines are all singled out and circulated outward (from inside to outside)
1. Blank sample: first add various auxiliaries (without leveling agent) - add dyes - run according to the temperature and time of dyeing process.
2. Testing leveling agent: first add various auxiliaries - leveling agent - adding dyes - according to the temperature and time of dyeing process.
3. Drying yarn after normal dyeing treatment
Experimental evaluationMethod 1: Visual measurement was used to evaluate the internal and external color difference of cheese yarn adding leveling agent and without leveling agent.
Method 2: The yarns in the test tube were taken from home and abroad, and the color difference was measured by computer.
Note: This method can also be used to compare the levelness of different dyes!