Polyester is the most common for garment printing. Two different types of mesh weaves are available. Plain weave is a simple one-over/one-under pattern similar to a basket. This allows for a very sharp print when you are screen printing detailed designs. Twill weave is a two-over/two-under pattern. This does not provide the sharp detail like the plain weave but it does allow for more ink to pass through the mesh at higher mesh counts. Most applications are best when printed with plain weave mesh.
Mesh colour is also something to consider.
Customers often ask what the difference is between white and dyed mesh. White mesh has a tendency to refract light. This causes undercutting of your stencil and you can lose important detail. Yellow mesh reduces refraction because it reduces the travel of ultraviolet light. Dyed mesh will take a longer exposure time but it is a small price to pay when you could be losing fine lines and half-tones, so printing through meshes over 100T dyed mesh is preferred.
Using proper mesh tension procedures will allow for optimum print control and performance. It is important to understand that one definitive mesh tension level does not exist. Every mesh count, every thread diameter, and every thread material may tension at different levels.