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  • How to Make a Pure Black Photography Background

    Logarithmic reflectance charts intended for aligning 3-channel tube-type broadcast video cameras came with a rectangular strip of black velvet mounted horizontally on the 4 x 3 aspect ratio chart, which was intended to act as the zero reflectance (black) reference for setting the baseline black level. It started out pretty black but unfortunately, it eventually got smoothed out and became too reflective. One method for getting a really dark area to replace it was to cut out the portion of the chart that was covered by the strip, then attach a box to the back of the chart, centering it over the resulting hole. The inside of the box was painted with flat, matte black paint and the box was big enough that any light shining through the hole into it from any angle other than dead-on didn't i...see more »Logarithmic reflectance charts intended for aligning 3-channel tube-type broadcast video cameras came with a rectangular strip of black velvet mounted horizontally on the 4 x 3 aspect ratio chart, which was intended to act as the zero reflectance (black) reference for setting the baseline black level. It started out pretty black but unfortunately, it eventually got smoothed out and became too reflective. One method for getting a really dark area to replace it was to cut out the portion of the chart that was covered by the strip, then attach a box to the back of the chart, centering it over the resulting hole. The inside of the box was painted with flat, matte black paint and the box was big enough that any light shining through the hole into it from any angle other than dead-on didn't illuminate the portions that the camera could "see". Result: effectively, a "black hole" in the chart, giving a zero-reference much better than the original velvet surface. For smaller objects to be photographed, by using a large enough box and carefully-positioned lights, the same effect ought to be obtainable.

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