What is true about photograms?

Photograms are a unique form of photographic prints that are created without the use of a camera. This process involves placing objects directly onto the surface of photographic paper and exposing it to light. The areas of the paper that are not covered by the objects will react to the light, creating a stark contrast between the exposed and unexposed parts. This method allows for creative expression through the interplay of light and shadow, capturing the shapes of the objects used.

The other options do not accurately describe photograms. They do not necessitate any camera equipment, and they can be produced in both black and white as well as color, allowing for a wide range of artistic possibilities. Additionally, photograms do not require multiple exposures since the image is created in a single light exposure, making the process quite distinct from traditional photography that often relies on multiple exposures to create composite images.