The 07-456 High-Purity Aluminum Step Wedges are built to US Federal Specification GG-X-635C. The 07-456 determines mAs linearity, as well as contrast vs. kVp. On these high-purity aluminum step wedges, even numbered steps are identified with lead numerals.
Available in 11 steps and 21 steps, these step wedges are used for:
- Darkroom fog testing
- Film and screen comparison
- Technique chart development