In the process of exposure, the machine is using the ultraviolet light to solidify emulsion. While the white color mesh will reflect or diffuse reflect the ultraviolet lights to the border of the emulsion, where shouldn’t be solidified, resulting in lower resolution and clarity of graphics, sometimes the fine lines are not fully formed
But for the yellow mesh, the mesh will only reflect the yellow light, having no effect on the photosensitive, can produce a clear image and fine lines, improving high-precision film version. Of course, yellow wire mesh will take more time on exposure process time than white mesh.
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