I am brand new to screen printing and have lined up a job with a local high school. They have sent me an image they want placed on their shirt but I cannot get it to expose correctly because the image is light. I would consider myself a novice with Photoshop and I am having a hard time darkening the image enough for it to expose on the screen. Can anyone please help?? I can email the jpeg file if anyone is willing to help. Thanks in advance!!!