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Name: M.W.
Status: Student
Age: N/A
Location: N/A
Country: N/A
Date: August 2004


Question:
In the Sunday, July 25, 2004 edition of The Columbian in the business section I read an article. The name of the article was "Think Ink". the full quote was " A high-end inkjet printer today is precise enough to heat up ink to several times the temperature of the sun, and shoot 36,000 droplets of ink through 512 nozzles each second." How is that possible?



Replies:
Ink jet nozzles can indeed shoot over ten thousand droplets of ink each second. The temperature seems to be an exaggeration, as temperatures of 300-400C are adequate for bubble nucleation. Perhaps the article meant several times the temperature to boil water. Although inkjet printers may have many nozzles (for different colors and drop sizes) they are generally not operated all at the same time.

Bob Erck



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