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UPPTECKNINGSMATERIAL UPPBAERANDE EN FAERGFRAMKALLNINGSKOMPOSITION
UPPTECKNINGSMATERIAL UPPBAERANDE EN FAERGFRAMKALLNINGSKOMPOSITION
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机译:录制色彩呈现色彩发展成分的材料
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摘要
A colour developer for use in a pressure- or heat-sensitive record material comprises a particulate amorphous hydrated silica/hydrated alumina composite in which the hydrated silica and hydrated aiumina are chemically bound and in which the mean alumina content on a dried weight basis is up to 7.5%, based on the total weight of silica and alumina. The composite may be metal-modified, e.g. with copper.
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