I'm just wondering if anyone with some experience can help.
I designed some T-Shirt designs in photoshop and found a screen printer, but i don't know how to send them the designs. Does anyone know the best format to send the files and whether i should send them separately and include a photo of how the design should be placed on a T-shirt?
Any help would be appreciated
It all depends on your design and the printer you're going with.
For example its a picture of a girl and you want it to look like a picture. You can color separate in Photoshop. Or your printer might have someone available for that.
If its just text one color you CAN send a photoshop file, but its a lot cleaner on Illustrator vector format. But If you created the Photoshop file according to the size or bigger than you want it you should be fine. But if you created it smaller you're going to have to recreate it. For example if you want to print your design 13 inches across the chest but you designed it at 5 inches width, changing the size to something bigger in photoshop with either make your design blurry or pixelate. Thats why illustrator is preferred because you can increase the size to anything and it will never pixelate.
If its multiple color you can again color separate in Photoshop. (there are many tutorials on Youtube on that)