ISO 18944 pdf download Imaging materials — Reflection colour photographic prints — Test print construction and measurement
This International Standard specifies requirements and recommendations for the digital test filecontent, number of print replicates, printer setups and printing procedures that are used to generatetarget prints for test method standards and specifications for image stability in the context of reflectioncolour photographic prints.
2 Normative references
The following documents,in whole or in part,are normatively referenced in this document and areindispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.ISO 5-3, Photography and graphic technology — Density measurements – Part 3: Spectral conditionsISO 5-4, Photography and graphic technology — Density measurements – Part 4: Geometric conditions forreflection density
ISO 2471:2008, Paper and board一 Determination ofopacity (paper backing) – Diffuse reflectance methodISO 12640-3:2007, Graphic technology — Prepress digital data exchange — Part 3: CIELAB standard colourimage data(CIELAB/SCID)
ISO 13655,Graphic technology – Spectral measurement and colorimetric computation for graphic artsimages
ISO 18941, Imaging materials — Colour reflection prints — Test method for ozone gas fading stability
IEC 61966-2-1, Multimedia systems and equipment — Colour measurement and management — Part 2-1:Colour management- Default RGB colour space – SRGB
TIFF, Revision 6.0.Adobe Systems Incorporated 19921)
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
printer configured to accept digital files with colours encoded in terms of CMYK printer colourants
3.2image forming materials stability testtest to evaluate the print stability of the component materials that comprise image prints, intendedfor manufacturers who are designing new colourants or for customers who are specifying colourantcharacteristics
image print stability test
test to evaluate the print stability of images printed in end-user-typical fashion
operational control point
set point for equilibrium conditions measured at sensor location(S) in an exposure device
SOURCE: ASTM G113- modified]
positive and negative deviations from the setting ofthe operational control set point during equilibriumconditions in a laboratory-accelerated weathering device
Note 1 to entry: The operational fluctuations are the result of unavoidable machine variables and do not includemeasurement uncertainty. The operational fluctuations apply only at the ocation of the control sensor and do notimply uniformity of conditions throughout the test chamber.
SOURCE:ASTM G113- modified]
range around the operational control point for measured parameters within the intended exposure areawithin the limits of intended operational range
Note 1 to entry: Operational uniformity evaluates the measured parameters throughout the test chamber so thatregions of the test chamber can be determined to comply within the required limits of the measured parameteroperating aim.
SOURCE:ASTM G113- modified]
system to generate reflection colour photographic prints, including printing colorants, printingequipment hardware and software, and typically the print media
Patch Value Rating used in the patch selection process equations