What are the requirements for the mesh count of the screen printing plate photosensitive thickness ?

What are the requirements for the mesh count of the screen printing plate and the thickness of the photosensitive glue of the screen?
There is a certain correlation and requirement between the mesh count of the screen printing plate and the thickness of the photosensitive glue, as follows:
The general relationship between the mesh count and the thickness of the photosensitive glue: Under normal circumstances, the thickness of the photosensitive glue layer is about 10%-25% of the screen thickness. For prints that require high clarity, when using a 90 mesh/cm or finer screen, the thickness of the photosensitive glue layer on the screen is generally 10μm-18μm. If it is halftone printing, because it requires a thinner ink layer, the photosensitive glue layer is also thin, about 4μm-8μm, and the thickness of the photosensitive glue layer is about 10% of the screen thickness.
High mesh screen: When using a high mesh screen (such as 300 mesh or more), the mesh is small. In order to ensure the fineness of the pattern and the transparency of the mesh, the thickness of the photosensitive glue should be relatively thin. If the photosensitive glue is too thick, it will clog the mesh, resulting in poor ink transfer and affecting the printing quality. It is generally controlled at around 10μm-15μm. For example, when printing high-precision electronic circuit board patterns or fine art paintings, it is necessary to use a high-mesh screen with a thin photosensitive glue layer to accurately present fine lines and pattern details.
Low-mesh screen: The mesh of a low-mesh screen (such as less than 100 mesh) is larger. In order to prevent ink leakage and ensure the thickness of the printed ink layer, the thickness of the photosensitive glue can be appropriately increased. It can usually be around 15μm-30μm, or even thicker. The specific thickness should be determined according to the actual needs of printing. For example, when printing large-format advertising posters or fabrics that require a thick ink layer, using a low-mesh screen with a thicker photosensitive glue layer can fully transfer the ink to the substrate and achieve an ideal printing effect.
Take into account both printing effect and quality: In actual production, when selecting the thickness of the photosensitive glue, it is also necessary to comprehensively consider factors such as ink characteristics and substrate surface characteristics. For example, when using ink with good fluidity, the photosensitive adhesive can be slightly thinner; when the surface of the substrate is rough, the photosensitive adhesive needs to be thicker to ensure that the ink can be evenly transferred and well adhered to the substrate. At the same time, different printing processes and equipment may also have different requirements for the thickness of the photosensitive adhesive, and the best combination needs to be determined through experiments and experience.