James-heal. Grey Scale For assessing Change in Colour and Staining评估灰色样卡（变色、沾色）/ 变色、沾色灰卡
一套有变色与沾色两种灰色样卡；每个样卡中包含两组系列的色片，以这些色片用目视对比方法评估试样测试后的颜色变化或贴衬布上沾色的程度，评级分为1至5级，5级为最佳结果而1级为最差。
There are two types of Grey Scale, comprising two series of chips,
against which the degree of colour change of a specimen and the
staining of undyed adjacent fabric can be visually assessed and rated
on a 1-5 scale, grade 5 being no change and grade 1 severe change in
some standards.
The ‘Change in Colour’ Scale is used to assess change in colour in
fastness tests (eg washing, dry cleaning, water, perspiration and
light).
This Scale consists of nine pairs of grey coloured chips ranging from
grades 1 to 5 (with four half steps).
The ‘Staining Scale’ is used to assess the degree of staining on
undyed adjacent fabrics during fastness tests.
This Scale consists of nine pairs of grey and white coloured chips ranging from grades 1 to 5 (with four half steps).
KEY FEATURES
- Manufactured strictly in accordance with the requirements of ISO 105-A02 and -A03
- Free Certificates of Conformity available
- Robust Construction – withstands constant handling
- Attractive PVC Case – protects the Scale from damage or contamination
