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Measurement backings
On this page you will find the definition of measurement backings according to ISO 13655 standard and a spreadsheet program for converting measured values between the white and black backing. Detailed information on this topic can also be found in our research report no. 10.054.
Definition according to ISO 13655
White Backing | Black Backing |
|---|---|
| Opaque (opacity > 99 %) | Opaque |
| Diffuse-reflecting | Diffuse-reflecting |
| CIELAB C* ≤ 3 (should ≤ 2.4) | Not spectrally selective |
| No fluorescence (∆B ≤ 1) | Visual density: 1.6 ≥ VD ≥ 1.3 |
| Spectral reflectance factors: | |
| 0,74 ≥ R(380nm) ≥ 0,12 | |
| 0,80 ≥ R(390nm) ≥ 0,19 | |
| 0,84 ≥ R(400nm) ≥ 0,37 | |
| 0,87 ≥ R(410nm) ≥ 0,61 | |
| 0,88 ≥ R(420nm) ≥ 0,75 | |
| 0,89 ≥ R(430nm) ≥ 0,78 | |
| 0,90 ≥ R(440nm, 450nm) ≥ 0,79 | |
| 0,91 ≥ R(460nm, ..., 730nm) ≥ 0,79 |
Please check with your backing manufacturer for compliance to the specifications of the current version of ISO 13655:2017.
In addition, proof papers that meet the requirements can also be used as white backing. To find out whether your paper is suitable for this purpose, simply click on the corresponding entry in our Proofpaper-FograCert-Database.
Downloads
| Title | Description/abstract | Version | Date | File type | File size | Download |
|---|---|---|---|---|---|---|
| WB-BB Calculator | Excel Spreadsheet for calcuation from WB to BB values | V1.0 | 17.09.2020 | xls | 261 KB | Download |