How to Use Photo Emulsion Sheets for Screen Printing

When it comes to screen printing, using photo emulsion sheets can be a game-changer. These sheets simplify the process of creating screens by eliminating the need to mix and apply liquid photo emulsion. In this article, we'll walk you through the step-by-step process of using photo emulsion sheets.

Preparing the Screen

Before you start, make sure your screen is dry and free of any debris. Remove the top plastic sheet from the emulsion and allow the screen and emulsion to dry completely in a dark place. Check the back of the emulsion sheet for any dry spots and re-wet if necessary.

Applying the Emulsion

Once the screen is dry, pass a squeegee over the emulsion several times to adhere it to the screen. Place the dull side of the emulsion sheet on the bottom of the screen (non-well side) and wet the screen evenly with water. Squeegee off any excess water, as the emulsion dissolves in water.

Important Notes

It's crucial to keep photo emulsion sheets away from light sources until you're ready to use them. Photo emulsion reacts with light, so exposure to direct sunlight or UV lighting can ruin the sheet. Additionally, these sheets have a shelf life of approximately six months when stored in a cool, dark place.

Exposure Times

The exposure time for photo emulsion sheets will vary depending on your exposure unit and the thickness of the sheet (38 microns). If you're using an old Yudu Machine, we found that the sweet spot was around 14 minutes. However, this can change depending on your specific setup.

Tips for Using Photo Emulsion Sheets

While photo emulsion sheets simplify the process, there is still a learning curve to master. It's essential to get the right amount of water on the sheet so it adheres properly to the screen and doesn't pool in one area. If you're new to liquid photo emulsion, these sheets might be a quick and simple alternative.

In conclusion, using photo emulsion sheets can be a great way to simplify your screen printing process. By following these steps and keeping in mind the important notes, you'll be well on your way to creating high-quality prints with ease. Whether you're a seasoned pro or just starting out, photo emulsion sheets are definitely worth considering for your next project.

Photo emulsion sheets