Pinholes and bubbles are common headaches in dip coating. A single tiny hole can ruin an otherwise perfect product. If you are struggling with these defects even after thorough cleaning, here are three simple solutions.<\/p>\n\n\n\n
Most pinholes come from tiny dust particles on your parts. When dipped, the liquid avoids these particles, leaving a hole behind.<\/p>\n\n\n\n
Solution: <\/strong>Clean and de-ionize your parts right before coating. We also highly recommend putting a clean booth over your dip coater to block airborne dust. <\/p>\n\n\n\n Bubbles often happen when air gets trapped during mixing or dipping.<\/p>\n\n\n\n Solution:<\/strong> Let the liquid rest after mixing so bubbles can rise and pop. For thick liquids, use a vacuum to remove the air. Also, dip your parts slowly so you don’t push air into the tank. <\/p>\n\n\n\n If your solvent dries too fast, trapped air bursts through the surface and leaves a pinhole.<\/p>\n\n\n\n Solution:<\/strong> Slow down your drying time or pull the part out very slowly. SDI\u2019s 1 nm\/sec ultra-low speed control is perfect for this. It pulls the part out so slowly that air isn’t trapped, creating a smooth, dense film.<\/p>\n\n\n\n To stop pinholes, you must control your environment, liquid, and speed. If you still have problems, it might be your equipment. At SDI, we offer precision machines and testing services to help you get a perfect coat.<\/p>\n\n\n\n \u25bc Check SDI’s Product Lineup for Flawless Coating<\/strong>2. Trapped Air<\/strong><\/h2>\n\n\n\n
3. Drying Speed<\/strong><\/h2>\n\n\n\n
Summary<\/strong><\/h2>\n\n\n\n
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