@365anne I have a fiber board that has black on one side and white on the other side. I put a plexiglass piece on top of that. I used top and side light. The black comes out dark grey, but if I decrease black in post processing it makes it really black. I use my iphone and turn the phone so the lenses are as near to the bottom as they can be.
@marylandgirl58 Yes. That should work well. To set focus and exposure, press and hold until AE/AF Lock shows at the top of the screen. Then you will see a yellow box with a sun next to it. The box is the focus and the sun sets the exposure. Slide your finger up and down to set the exposure. https://iphonephotographyschool.com/focus-tips/ or. https://youtu.be/JBdH-bttN-c