When over exposed, you may get residue emulsion that remains on the screen just slightly translucent then the original hardened emulsion.
What happens if you overexpose a silkscreen?
An overexposed screen wont allow for enough ink through your screen while printing— resulting in prints with poor detail. An underexposed screen means youve lost too much emulsion and youll be throwing too much ink. Do yourself a favor and invest in a screen printing exposure calculator.
How long should emulsion dry before exposing?
The key to drying is that all the water contained in the emulsion must be completely evacuated from the coating. This is generally accomplished by using heat, a dehumidifier, or both. A typical coated screen generally will be dry to the touch after one hour at 70°F (21°C) and relative humidity of 50%.
Can you let emulsion dry overnight?
Most manufacturers suggest allowing a coated screen to dry for 24 hours. I would let it sit at least 4 hours before exposing. Exposure times depend not only on your unit and the method you chose to coat with (1/1, 2/2, etc) but also the emulsion itself. Dual cure emulsion take longer to expose.
How do you spread emulsion on a screen?
2:133:59How to Coat a Screen Frame or Coating Screens 101A! - YouTubeYouTube
Can you fix an overexposed screen?
Once washed out and dried, through the screen back in the exposer to get everything cured as it should be. This is not ideal, but it should get you a usable screen if you need it in a hurry. You can correct the film later.
How long does silk emulsion take to dry?
Approximately 10–12 square metres per litre, depending on the nature and porosity of the surface. Touch dry in 1–2 hours. Recoatable after 3–4 hours. 1 Litre, 2.5 Litre, 5 Litre, 10 Litre.
Do you put emulsion on both sides of a screen?
Yes, both sides for optimal results. Do the substrate side first and then the inkwell side. Doing it in this order ensures the emulsion is pushed to the substrate side which is where your stencil is created.
What happens if screen is underexposed?
If the screen is underexposed, it should be reclaimed. If you continue to develop the already underexposed screen, you will actually wash away much of the stencil. All that hard work coating the screen will be washed down the drain and what started out as a good coating of emulsion is now too thin.