Process you use the Defoamer:
Textile Slurry   Scouring   Dyeing   Printing
Textile & Dyeing Temperature:
Room temperature  50~60℃   70~90℃   130℃
pH Value of Foaming Medium:
Strong Acid    Weak acid    Neutral     Strong Alkali  Weak Alkali
Current-used Defoamer Type
Silicones      Non-silicone   Polyether     Indifference
The current usage method of Defoamers you preferred is:
Dilution  Without dilution Directly add into the final product
Add after the bubble occurs Pre-add it into the system as foam inhibition agent 
Other situation
If you use defoamers by diluents, and what is the dilution ratio?

Method of Dilution: By Water     By Thickening Diluents    Other
Thickening Diluents Type :
Weak Anionic      Non-Ionic    Acrylic    Others