here is the "technology":
1. start with one of those priority mailing boxes, seal one end, put a heavy book inside. That makes the backdrop to put your black velvet drape over it, which then also cascades down under where the glass sits.
2. next, take two of the big priority boxes, and put them to each side and slightly in front of the backdrop box that already has the blackvelvet draped over it.
3. balance your 18" self-contained $20 blacklight STIK from Wally-world on those two boxes, so it is elevated above the photography area. The STIK has a backside where the wiring goes through, and so I don't get glare, that base points toward the camera.
4. I forgot to mention....I do this on the bathroom vanity, cuz I can close the door and have it dark in the daytime. (no window in that bathroom).
5. Set up the tripod with the digital camera. I shoot from about 1 - 1 1/2 ft. away, depending on the height of the object being photographed. Closer if it is something small like a 3" posey vase.
6. I turn on the light behind me that is over the shower and that is my only light on,other than the blacklight. That allows the camera to actually focus if it decides it is not getting enough light to reach automatic focus. It also comes in handy to leave that light on in the instance where there is painted decoration that you want to see other than 'black' and 'green'. Those examples are the little Peacock Posey vase and the Expresso Cup and Saucer. Notice how the painted decorations have color to them. The paint picks up a little of that back lighting, but the overall effect is from the UV. I take a photo with the shower light on, and one with it off with only the UV as my light source. Whichever one turns out best is the one I use.
The tripod and a strong UV are the most important. You can seldom get a good shot if you are trying to hand-hold the camera.
7. A good photo editor program like PHOTOSHOP takes care of any enhancements that are needed, such as brightening, improving contrast, or tweeking the sharpness of the image if it is just a tad out of focus.
I use a Toshiba 2.3 megapixel digital camera. pretty average camera. nothing special. I have had the piece of velvet for at least 5 years, and the 18" blacklight STIK for a little longer. I just grabbed 3 boxes out of the garage. no special technique. Shoot several, pick the best one.