“Why does my film thickness change between morning and afternoon?” If your machine settings are exactly the same but your results keep changing, the problem is probably the air in your lab. Let’s look at how solvent evaporation and airflow affect your coating quality.<\/p>\n\n\n\n
Basic coating formulas assume your liquid stays exactly the same. But in reality, the solvent starts drying the second the part leaves the liquid. As it dries, the liquid gets thicker. This can make your final film too thick, or leave drag marks if it dries too fast.<\/p>\n\n\n\n
A slight breeze from an air conditioner or someone walking by can change how fast your solvent dries. If you use fast-drying solvents like alcohol, even a tiny draft will cause streaks and uneven spots on your part.<\/p>\n\n\n\n
Professional labs fix this by controlling the air. The best way is to put a clear cover (a chamber) over the entire machine. This blocks room drafts and keeps the evaporation rate stable inside.<\/p>\n\n\n\n
Dip coating is a sensitive process. Having a stable environment is just as important as having a good machine. If you can’t control the air in your lab, SDI offers contract testing services in our own fully controlled environments.<\/p>\n\n\n\n
We offer testing services in controlled environments. Learn more.<\/strong>
https:\/\/www.sdicompany.com\/en\/jutaku<\/a><\/p>\n\n\n\n