![]() As this is not possible you are unlikely to get a correct exposure. Too thick or too thin a coating of emulsion causing thick or thin spots that have under or over exposed leading to washout problems (which you are then tempted to blast out.) Variable thickness in your emulsion would require a variable exposure time. Give the screen a little soak for 30 secs before starting the wash out. Don't blast the emulsion out too quickly, turn down the pressure and keep the water flow or jet moving about the screen. Water pressure is too high during wash out.If its breaking down during printing this is also a common sign of under exposure. ![]() If your emulsion is totally washing out or falling off, your screen is definitely under exposed. Or both! Without enough light and for too short a time the emulsion does not fully bond and go hard during exposure. It could be that the light source is not bright enough (or the wrong kind of light waves). Under exposure means not enough light is hitting the emulsion coating on the screen. Emulsion washing off or breaking down in wash out. Not just the bits you want to come out but all of it or more than the exposed part: ![]() Here are some common issues, the causes and remedies. Whilst this can all sound quite negative, you can expose your own screens easily and we're here to help you make it happen! With the super high quality screen printing products available it is rarely the products that are faulty, its almost always in the process. We think our screen looks great only to find that we have a bunch of problems when it comes to exposing them.Ī few of the problems can have the same causes so if you can sort those you are on to a win.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |