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For example, if the lightfastness of the colourant is indicated to be 5 on the Blue Wool scale, it can be expected to fade by a similar amount as the strip number 5 in the Blue Wool test strip set. The success of the test can be confirmed by comparing the test strip set with the reference set that was stored protected from the light. [12] [13]
A rating between 0 and 8 is awarded by identifying which one of the eight strips on the bluewool standard card has faded to the same extent as the sample under test. [ 4 ] [ 5 ] Zero denotes extremely poor colour fastness whilst a rating of eight is deemed not to have altered from the original and thus credited as being lightfast and permanent.
The reflected light is collected by a second fiber optic. [3] The period of exposure is monitored with a probe that transforms the reflectance spectrum into color coordinates in real-time. A typical microfading test is achieved in less than 10 minutes and replicates exposures equivalent to 5–12 years of display at normal museum light levels. [5]
In general, clothing should be tested for colour fastness before using bleach or other cleaning products. [3] Lightfastness, wash fastness, and rub fastness are the main forms of colour fastness that are standardized. The light fastness of textile dye is categorized from one to eight and the wash fastness from one to five, with a higher number ...
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Date/Time Thumbnail Dimensions User Comment; current: 04:12, 27 December 2014: 500 × 429 (78 KB): Mgibby5 {{subst:Upload marker added by en.wp UW}} {{Information |Description = {{en|A schematic plot of the dielectric constant as a function of light frequency showing several resonances and plateaus indicating the activation of certain processes which can re...
Part Two Each of the 10 questions has its own chapter in which I review the background material and provide further explanation to help you answer each question for yourself. Part Three Your own Best Year Yet workbook with space for Your Best Year Yet® 4 Excerpt - Three Hours To Change Your Life