How does the colour of your screen printing mesh affect the exposure of your screen printing emulsion and stencil?
When exposing capillary film or emulsions, treat the photostencil and mesh as a complete entity because of the influence of the mesh on light scatter. This affects both resolution, definition and exposure level.
The diagram below shows the light scatter caused by white mesh vs yellow mesh. Scatter increases with the increase in mesh count and exposure time. As this can cause considerable loss of resolution and definition it is recommended that dyed meshes are used, especially when reproducing fine detail.
Dyed meshes aborb the UV light, thus minimising light scatter hence exposure times have to be increased by 50-150% over the times used for white mesh.
For the best resolution and definition of your screen printing stencil, you should use yellow mesh.
Please feel free to share this 'How to Screen Print' guide with your friends, on blogs and via social media.
If you have any excellent screen printing hints and tips, please share them in the 'Screen Printers Of The World Unite Communities' on Google+, LinkedIn and Facebook or contact us via firstname.lastname@example.org and maybe we can feature them in a new guide.
For more guides visit our 'How To Guides' page.
Name: William Shorter
Mobile Number: +44 7831 109181