Scoop Coater for screen printing
When it comes to applying emulsion, you need the best scoop coater in order to get the job done right. A scoop coater can be used for two very different purposes when working with photopolymer plates.
Each has its own purpose and both are great tools that will help your printing business excel in efficiency!
The first use is an application of a negative film (emulsion) onto a plate using ultraviolet light.
When this happens, there are no rollers or squeegees involved anywhere along with the line-just simple gravity feeding so you don’t have issues like ghosting on press due to backside wetting!
Silk Screen Printing Coating Tool
|Dual Edge Aluminum Scoop Coater||
Silk Screen Printing Aluminum Coating
|Emulsion Scoop Coater||
Emulsion Scoop Coater for Silk Printing
|DELIOU Dual Edge Coater||
How to Coat a Screen Frame or Coating Screens?
In this blog post, we will go over the basics of what emulsion coating is and when you should apply it to your screen printing project. We’ll also cover a few tips and tricks that can help you get a more accurate print on your screens.
- Fill the scoop coater with the emulsion.
- Fill the scoop coater ¾ to the top.
- Make sure the scoop coater is level from end to end, or the emulsion may flow out of the ends of each side!
- Using a scoop coater, spread a thin layer of paint onto your screen. Using the template as a guide, firmly press into the screen and angle the scoop flat against it. To end your stroke, quickly turn the scoop coater back to its original position by angling it outward.
- Turn the screen inside out (where the ink goes) and repeat steps 3 through 4.
If you are using a DUAL DIAZO you will need to mix the Diazo into the emulsion one hour prior to coating screens.
Pour the emulsion into the scoop coater. Fill it ¾ of the way full and then pour out any excess that may be in your container so that when you coat your screen it is not too thick or thin. This makes applying an even layer much easier!
We recommend having a piece of paper on hand while coating your screens in case there is a spillover from either end, this can help catch anything else that might come out during application before going onto your tabletop surface where clean up could spread these chemicals elsewhere!
Holding your scoop coater from its bottom center, make sure it is level so that the emulsion does not run out from either end of your scoop coater. Once you’ve coated both sides of your screen make certain to use a dry paper towel or rag and wipe any excess off.
Pressing firmly into the screen, press against the screen and pull upward towards the top quickly angling back toward the center with each stroke! If this isn’t done in quick succession (within about one second) then it will be difficult to get an accurate print because the image won’t come out even on all parts of your printing surface – essentially resulting in underexposure!
Remember there are no rules here just guidelines for successful coating applications, if you do find yourself doing several coats then it’s best practice to re-rinse your screen with water and a garden hose.
How to Apply the Layer of Emulsion for Screen Printing?
Common mistakes when applying the layer of emulsion:
- Not using enough water (emulsion will be too thick) – you want your image just barely to dissolve as it runs across surface.
- Not rinsing screens well after application – You not getting an accurate message on all parts of printing area.
- Rinsing screens in high pressure setting which can force chemicals out from other areas.
- Using old emulsions – Emulsions have about a year shelf life before they become unusable. Don’t use old emulsion!
- Leaving screens in water too long.
How to coat a screen with emulsion without a scoop coater?
Use a dry paper towel and wipe off any excess liquid. Press firmly and pull towards the top with each stroke.
If you are applying more than one coat, then it is good practice to rinse your screen with water and a hose.
How to DIY Screen Coating?