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Japanese standard gray card, used to evaluate discoloration in color fastness test.
| specification: | it is divided into 1~5 levels, increasing by half. It is packed in the packaging case |
GCI Testing Instrument Co., Ltd
Tel：+86 0769-22322732 Mobile：13794832878(wechat)
ATTN：Mr.chen Email：Janray@163.com
Address：No. 41, East Zone 2, Xinxing Street, Datangtou, Dongcheng District, Dongguan City
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