BS ISO 18944:2014 pdf free

BS ISO 18944:2014 pdf free.Imaging materials – Reflection colour photographic prints – Test print construction and measurement
parameter associated with the result of a measurement that characterizes the dispersion of the values that could be reasonably attributed to the measurand
Note 1 to entry: The parameter may be, for example, a standard deviation (or a given multiple of it), or the half-width of an interval having a stated confidence level. Uncertainty of measurement comprises, in general, many components. Some of these components may be evaluated from statistical distribution of the results of series of measurements and can be characterized by experimental standard deviations. The other components, which can also be characterized by standard deviations, are evaluated from assumed probability distributions based on experience or other information. It is understood that the result of the measurement is the best estimate of the value of the measurand, and that all components of uncertainty, including those arising from systematic effects,such as components associated with corrections and reference standards, contribute to the dispersion.[SOURCE: ASTM G113一modified]
BS ISO 18944 specifies constraints on factors pertaining to target print preparation and resulting target print measurement which can cause confounding test-process-induced variation of measured colour values and densities. The requirements of this International Standard shall be applied in test methods that are used to make life expectancy claims, such as time-based print lifetime claims, either comparative or absolute, in accordance with the applicable International Standard(s) for specification of print life.
The requirements of BS ISO 18944 should be applied with image stability test methods when those test methods are used to report stand-alone absolute or comparative stability of image materials with respect to the specific failure mode of the test method standard.
In alternative test situations, when the conditions and constraints set forth in this International Standard are not followed, then the test report of that test method result shall include a statement of each condition that differs from the requirements of this International Standard. Caution shall be used when comparing test results for different materials and for different target print preparation and measurement conditions. Comparisons shall only be made when using equipment with matching specifications, under matching test conditions.BS ISO 18944 pdf free download.