Habbie is technically correct. The grey card is a pro method. As is the Ambient light meter method.
Stumps,
First thing is to go to a lumber yard/home center and get two large vinyl floor tiles. One that looks like stone. Or two piece's of neutral colored rough cloth, burlap would be great. STRETCH them over a piece's of cardboad with tape on back. Try one of those for your light box floor and as background. Maybe the background boards should only be 6 or 8 inches high if you have light from back. Angle your back board to get rid of any shadow on it. Another trick if your camera takes its light reading thru the lens is to get a white cardboard and cut a hole in it to fit your lens thru, only large enough to be handy but bigger than your camera. Then reflections won't show your dark camera. I generally use a white cloth curtain on the front of my box and only stick the lens thru and pinch the cloth together while taking the exposure.
But in the end look at viewfinder or screen, really look hard, see how the blades and bolster are showing reflections. Move it around for best reflective shade of color and shadow effect. This is the pro method also. Your eye is the camera before you trip the shutter.
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PS A grey card is inexpensive, but you need to go to a photo store to get one, its about 5 x 7 in size. Or Internet.
Not the ultimate but just a version from recent past. Made a tripod device that attaches to box floor, so a tripod doesn't get tripped over.
Here you can see how my cloth floor curves up in back, this is current. But I don't use backlighting.
Here is how it looks with two piece background instead of curved. Early effort photo.
Using the two piece method here is how you hide the crack, with something in back of your knives.
Here is a blow up of Stumps photo, using your GOOD EYE as the camera, see the reflections in the bolsters and rivets. Is that you or something in your shop showing.......
I hijacked my own thread but a specific photo issue was addressed to a forum member so I declare it OK.....HA And as BG said with the sharing of all the knowledge the photos are getting really good. I am envious of some of you.
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