I'm a new photographer, and I'm trying to take photos of a product with a pure white background (#ffffff). I'm using a light box (something like this one), so my lighting should be solid.
But I can't seem to find the right settings for a good photo. I've taken lots of photos (100+), with a lot of different settings and basically my photos are either overexposed, or the background is not white. Here are some examples:
The product is great on this photo. Only the background is WAY to grey.
f/8 -- 1/2000 sec -- ISO-6400
The background is pure white. But the product is overexposed.
f/8 -- 1/320 -- ISO-6400
Too grey and the product is overexposed
f/22 -- 1/200 -- ISO/128000
Based on feedback, I have adjusted the exposure parameters and gotten somewhat better results, but that that alone doesn't solve the fundamental problem. What else do I need to do to get a pure white background without overexposing the subject?