Patent ID: 6755508
Filing Date: 2004-06-29
Classification: B41J

Abstract:
An image forming method comprising the steps of:printing at least two colors of ink onto a recording medium using an ink-set, which satisfies the below conditions (i) to (iv) and includes the at least two colors of ink and a liquid composition including an effect of cohering the at least two colors of ink; and forming an image, which includes a pattern of at least a secondary color, by printing the liquid composition on the printed ink, wherein (i) an average value of rates of change over time in contact angle of the respective inks on plain paper is at least 1.25 degrees/sec and no more than 3.5 degrees/sec, (ii) a rate of change over time for a contact angle of each ink on plain paper is less than 4.5 degrees/sec, (iii) a rate of change over time for a contact angle of a mixture of each ink and the liquid composition on plain paper is in the range of from 5 to 10 degrees/sec and (iv) the number of coarse particles, which have a diameter of at least 5 &mgr;m, in the mixture is at least 1Ã—104 particles/&mgr;L.