Ink for inkjet recording

Details Ink for inkjet recording Ink for inkjet recording

2005-08-16

2005-08-16

Klemanski, Helene (Department: 1755)

Compositions: coating or plastic

Coating or plastic compositions

Marking

C106S031860

Reexamination Certificate

active

06929689

ABSTRACT:
The present invention provides ink for inkjet recording containing ethylene glycol base ether and/or monovalent alkyl alcohol, a surfactant and a coloring agent, the ink showing the following characteristics when 2 μl of the ink is dropped on a piece of ordinary paper having smoothness of 100 sec or lower:a) an initial contact angle is in the range of 30 to 80°;b) a dynamic contact angle after 1 second X=θ−θo(θ is a dynamic contact angle after 1 second) according to dynamic absorption measurement is in the range of −70≦X≦−20 (°/s); andc) the rate of change of a dot area after t second (0.1<t<5(s)) Y=rt2/ro2(rtis a dot radius after t second) is in the range of 1.5<Y. With this ink, clear images which are less prone to smear are produced even by high speed recording on a piece of ordinary paper.

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