In the process of the ink drops forming and spreading ont,the viscosity and surface tension of the ink play an important role,and then the drops' injection and printing quality will be influenced by this process.Besides,drops control technology is the key of ink-jet printing technology,and the drops' injection state will also influence the printing quality.In order to research the influencing factors to printing quality,many samples with different performances are prepared and their drop states include speed,tail length and volume are measured with drop observatory.And then,the specimen pages include lines of different width are printed,order to assessment the printing quality comprehensively,their line width,raggedness,blurriness,density and contrast are measured.The result show that the inks with different performance show different speed,tail length and volume,and their corresponding printing qualities are different too,and there exists linear relationship between printing quality and the drops' viscosity,surface tension and speed.
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