Stouffer RZ9, 9 step Zone System Chart

Stouffer RZ9, 9-step Zone System Chart, Zone I to IX

9 steps, Zone I to IX

Step-Wedge RZ9-Data

9 steps, size 1/2 x 8" - 12,7 x 203 mm


Visualization is a creative and subjective concept used when approaching the art of photography.
Visualization works by projecting the final photographic image in the mind.
To help the photographer use this creative concept, Stouffer has designed the RZ9 Zone System Chart.
The RZ9 displays the useable Zones of I to IX for comparison of the actual tonal values of photographic papers and images to be photographed

RoHS-Compatibility:
Products manufactured and sold by Stouffer Industries are RoHS compliant. All step wedges, step tablets, gray scales, and any other photosensitive quality control device made contain no or less than agreed levels of lead, cadmium, mercury, hexavalent chromium, polybrominated biphenyl (PBB) and polybrominated diphenyl ether (PBDE) flame retardants.

Longlivety:
Stouffer Step Tablets and Gray Scales are made under controlled conditions to meet or exceed the requirements for archival permanence following procedures recommended by the manufacturers of the materials. Archival permanence is usually defined up to 10 years or more. Studies at the National Institute of Science and Technology have shown that the densities of this kind of step tablet will remain stable for at least four years when handled and stored with care.

The primary causes of degradation are use, followed by ( in no particular order) heat, humidity, fingerprints, splashes including spittle, chemical fumes and vapors, attempts to clean the emulsion with anything other than a soft camelhair brush, and abuse.A quality control device that is handled 40 times a day will degrade faster than one that is handled once a week. The user should set a routine to determine the frequency of replacement based upon factors occurring in-house and the foregoing discussion.

We recommend to change the step wedge after 3-6 months and immediately at visual damage

Calibration:
This step wedge is also availabe in calibrated version. Lead time about 4 weeks