Stouffer XT1725, 17 step, transmission step wedge on x-ray film

Stouffer XT1725, 17 step transmission stzepo wedge on X-Ray-film

Conforms to NIST 38100C / NIST SRM 1001

Step-Wedge XT1725-Data

17 steps, size 1 3/8 x 10" - 35 x 254 mm

new developed transmission grey scale on x-ray film, conforms to NIS 38100C. 
For critical densitometry with traceability, the Stouffer T2120CC and the T1530CC meets and conforms to those needs. Densities of the T2120CC and T1530CC compare with those of a National Institute of Standards and Technology (NIST) Standard Reference Material No. 38120C Step Tablet by means of a densitometer that conforms to conditions specified in American National Standards Diffuse Transmission Densiy A.N.S.I. PH2. 19-1986. There is also the Stouffer XT1725CC step wedge produced on X-Ray film which conforms to NIST No. 38100C

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