The photochromic properties of the films were determined
by a color difference meter (SC–80C, Beijing Kangguang
Instruments Ltd.). The color differences (ΔC) of the
obtained films were characterized after being exposed
under a UV lamp device (a sealed box, containing 3 parallel
UV tubular lamp in it, each UV lamp possess a wavelength
of 365 nm, 3 W) and the films were placed 10 cm away
from the lamps. The Commission Internationale de'Eclairage
Lab uniform color space for color sheet system was
used to figure out the color difference. Ln
, an and bn are the
three-dimensional rectangular coordinates, which are
worked out from the tristimulus values. Ln refers to the
transparency index while an and bn refer to the chroma
indexes. The color difference (ΔC) is calculated according
to the formula below
The photochromic properties of the films were determinedby a color difference meter (SC–80C, Beijing KangguangInstruments Ltd.). The color differences (ΔC) of theobtained films were characterized after being exposedunder a UV lamp device (a sealed box, containing 3 parallelUV tubular lamp in it, each UV lamp possess a wavelengthof 365 nm, 3 W) and the films were placed 10 cm awayfrom the lamps. The Commission Internationale de'EclairageLab uniform color space for color sheet system wasused to figure out the color difference. Ln, an and bn are thethree-dimensional rectangular coordinates, which areworked out from the tristimulus values. Ln refers to thetransparency index while an and bn refer to the chromaindexes. The color difference (ΔC) is calculated accordingto the formula below
การแปล กรุณารอสักครู่..
