Inks
There are different inks that are perfect for different projects. All these have different temperatures to cure at and also have different techniques to be used, otherwise you can compromise your garment, product or ever screen.
Water based inks are really good for a smooth finish that feels like the print has soaked into the fabric rather than sitting on top. These are tricky to work with from the start as the screen has to constantly be flooded to prevent ink drying and thus creating blocked pieces within your print.
Plastisol ink is the most commonly used and doesn't need to be constantly flooded as it doesn't dry that fast ! These do sit on top of fabric and if al ot of layers are used, it can feel bulky, however with the right screen mesh and artwork, they are the best and most affordable option.
There are other inks that allow you to print on poly-mailers, and other items that are not related to the fashion industry, and can cure just by them selves!