Patent ID: 6598967
Filing Date: 2003-07-29
Classification: B41M,C09D

Abstract:
An ink jet ink set and recording element combination comprising:A) a porous ink jet recording element having a 60Â° specular gloss of at least about 5; and B) a pigment based ink jet ink set comprising at least two inks; wherein the RGD value is less than 40% and RGV value among inks is less than 10% when 60Â° is used as the specular angle; the RGD and RGV values are calculated according to Equations (A) and (B), respectively: â€ƒ&it;Equation&it;â€ƒ&it;(A)RGD&it;â€ƒ&it;%=&AutoLeftMatch;â€ƒ&it;&Sum;I=1N&it;â€ƒ&it;&LeftBracketingBar;Gloss&af;(Imaged&it;â€ƒ&it;Areas)I-Gloss&af;(Non&it;â€ƒ&it;Imaged&it;â€ƒ&it;Areas)&RightBracketingBar;&Sum;I=1N&it;â€ƒ&it;Gloss&af;(Imaged&it;â€ƒ&it;Areas)I&it;&NewLine;&it;â€ƒ&it;Equation&it;â€ƒ&it;(B)&it;â€ƒ&it;&NewLine;&it;RGV&it;â€ƒ&it;(%)=&Sum;I=1N&it;â€ƒ&it;&LeftBracketingBar;(Gloss&af;(Imaged&it;â€ƒ&it;Area)I-AG)&RightBracketingBar;AG/NWhere AG=&Sum;I=1N&it;â€ƒ&it;Gloss&af;(Imaged&it;â€ƒ&it;Area)INI is a variable which identifies a certain color patch used in the evaluation, N is the total number of color patches used in the evaluation.