According to the coating on the removal of various stains, the ability to resist a single stain is divided into ten grades, 1-10 grade (that is, the score 1-10 points). The corresponding X value of the 1 level is the initial value of the stain coating on the coating, that is, there is no removal ability of the stain. The 10 level represents the highest stain removal rate, which is equivalent to most of the stains can be removed. At the same time, in accordance with the depth of the stains were graded, namely when stains relatively darker colors, differential is relatively large; when the stains relatively lighter in color, graduation is relatively small.
Classification results of comprehensive coating removal ability of six kinds of stains, to the final evaluation of interior wall paint coating stain resistance ability.
Test results were evaluated by 0 to 4 grades and five grades, respectively, with the basic grey cards (GB/T250) 5, 4, 3, 2, 1 and a total of five grades (see Table 3).
After the removal of the two blocks of trials coated test panels respectively and a block without the coating test and test plate according to the GB/T9761-2008 in 8.2b of conventional colorimetric box and basic gray card color colorimetric rating.
Stain grade / level pollution degree of perception of color gray card level / 0 no pollution can not be perceived color 51 very minor had perceived color 42 minor obvious color difference 33 medium has obvious color difference 24 serious serious color difference 1