You can effectively remove screen block (also known as screen filler) from your screen printing mesh by using a specific cleaner like Speed Clean, combined with hot water and a nylon plastic brush for scrubbing.
Removing screen block is a necessary step to reclaim your screen for future prints or to correct errors. Unlike emulsion, which is typically removed with emulsion remover, screen block requires a different approach, often involving specialized chemicals and heat.
The Removal Process
Based on the provided reference, a successful method involves the following:
Required Materials
- Speed Clean: A chemical specifically designed for removing screen block/filler.
- Hot Water: The reference suggests using water that is very hot, like water boiled five or so minutes prior, just off the boil.
- Nylon Plastic Brush: A brush with nylon bristles is recommended for scrubbing the screen mesh.
Here's a breakdown of the process:
- Prepare the Cleaning Solution: Decant a small amount of the Speed Clean product into a suitable container.
- Apply and Scrub: Use the nylon plastic brush to apply the Speed Clean solution to the screen areas where the block needs to be removed.
- Add Hot Water: Apply the hot water to the screen.
- Scrub Vigorously: Use the nylon brush to scrub the screen mesh firmly. The combination of the Speed Clean, hot water, and physical scrubbing helps break down and lift the screen block from the mesh.
- Rinse: Thoroughly rinse the screen with water to remove all chemical residue and loosened screen block particles.
Key Points:
- Using hot water significantly aids in the removal process.
- A nylon plastic brush is suitable for scrubbing the mesh without causing damage.
- Ensure you are in a well-ventilated area when using cleaning chemicals.
This method provides a direct way to tackle dried screen block, preparing your screen for its next use.
