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The new printing system was triggered by including a colorless dye-base in the oil droplets (coated back, CB) and coating the second sheet of paper (coated front, CF) with acidic clay which could react with the dye-base to produce a color.

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zhaon1987(½ð±Ò+5, ·­ÒëEPI+1): 2011-03-12 15:46:48
zhaon1987(½ð±Ò+10): 2011-03-12 17:53:17
The new printing system was triggered by including a colorless dye-base in the oil droplets (coated back, CB) and coating the second sheet of paper (coated front, CF) with acidic clay which could react with the dye-base to produce a color.

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