Hi guys, I'm prtty new to photography so bear with me here. I always see nice photos of portraits or even simple objects set against a pitch black background. How is this achieved? If I buy black paper or black cloth, under normal light, you see the cloth pattern behind it, it looks a little grey-ish if you know what I mean. How do you guys make it perfectly black so that the audience only concentrates on the main subject in the photo?