Screen printing is basically like using a stencil with spray paint. The stencils we use to print apparel are made tightly woven mesh which is open so phthalate-free plastisol ink can pass through and the unprinted areas are blocked by photo-sensitive emulsion. Each color on a shirt requires its own screen and the number of screens required determines your color count. Each color you add to a shirt increases the cost. Different pieces of apparel can be screened in different places, the most popular locations being the front or the back of the shirt.
Getting a good print on a dark shirt often requires a base white layer, so if you are budget-conscious, remember that designs on white T-shirts are always the cheapest.
The Fine Print
Because we print by hand, we consider prints within 1/2" of movement in any direction (rotated, skewed, offset horizontally or vertically) to be within the standard variation allowed by the screen printing process.
Most garments shrink slightly when exposed to heat as the ink is curing. This is usually most noticeable on blends as different manufacturer's synthetic fibers react to heat differently. You will also be more likely to notice shrinkage on garments where only one side has been printed. In addition, some garment brands have tags that will curl or shrink under the heat. These are things that are typical risks when screen printing and we will not replace any merchandise or give a refund for these reasons.
When printing polyester or syhtetic fabrics, dye migration can occur where the color of the dyes in the fabric can discolor the ink due to a heat reaction in the curing process. This may discolor the ink and this is a risk we try to mitigate using the proper ink additives and inks formulated for printing on polyester, but because of the nature of the fabric and the process, this is not something we can be responsible for and si considered a normal risk in imprinting certain items.