Textiles Home | Print | Digital Print |
Print | 04: Coating Screens | Next >>
Firstly select a screen that will comfortably fit your separation, you will need at least a 6cm gap all the way round between the edges of your separation and the inside edge of the screens frame. Check that the screen mesh is taught, clean (you can hold it up the the light to double check) and dry. Choose the size of coating trough that will comfortably fit between the frame of your screen and is wider than your separation.


Wash hands thoroughly after use and prior to eating/drinking.
Spills and splashes to be cleared up. Suitable gloves/apron to be worn during coating.
Notification given to pregnant persons of the hazards of using Folascreen DC-101

Points 1 to 7 can be carried out with the exposing room door open.

1. Place your screen in a vertical position, tipped slightly back with the mesh side of the screen facing you. Make sure that it is placed in such a way so as not to move when you apply forward pressure to it.
2. Place your coating trough in a level position, slowly and carefully pour enough emulsion (Folascreen DC-101) to coat your screen into the coating trough.
3. Hold the coating trough horizontally in both hands and press it against the bottom of the mesh, just above the inside of the frame.
4. Tip the coating trough upwards so that the emulsion runs down and makes even contact across the entire lip of the coating trough.
5. While still holding the coating trough in an upwards direction - use firm pressure to move the coating trough up over the entire surface of the mesh until you are about 2cm from the top of the mesh. At that point keep the coating trough in contact with the mesh but tilt it back to a horizontal level to let the excess emulsion run back down into the coating trough. Now remove the coating trough with a slight side to side and upwards movement.
6. If there is any excess emulsion at the top, bottom or sides of the screen, wipe it away quickly with a paper towel. Pour the remaining emulsion from the coating trough back into the emulsion pot, using a paper towel will help push the remaining emulsion from the coating trough.
7. Hold the screen up to the light to check that it has been coated evenly, if you see darker patches of emulsion on the screen - caused by an uneven coating, these may run during drying and will cause difficulties during exposure. These thicker areas of emulsion can sometimes be reduced by taking a smaller, clean and dry coating trough and 'dry scrape' the excess off.
8. Close the exposing room door and place your coated screen vertically into the drying cupboards. Make sure to firmly close the drying cupboard doors afterwards. The drying process will take about 3 hours - or longer if the cupboards are full.
9. Thoroughly clean the coating trough and hang it up to drip dry.


Tips: Coating takes a little practice. Once you commit to the coating action, follow through until you reach
the top. The emulsion must be applied in one thin, even coat. Otherwise, it will not expose properly and the screen will need to be washed out and re-coated.


next >>

Back to the Print Content Page >>