New papermaking technologies can produce uncoated grades without the limitations which impair the quality of high quality inkjet printing, i.e. inferior ink optical density and inferior image permanence. This paper describes the emerging technologies which will overcome these limitations-just as the initial problems with uncoated laser grades were overcome, i.e. curl, thermal stability, coefficient of friction and electrical resistivity. Thew new technologies are: Enhanced SAA sizing which enables the production of high performance uncoated grades with reduced surface size addition levels. Reductions of up to 30% in surface size addition and 24% in OBA addition are possible. The new mordant technology which uncouples the traditional relationship between sizing and optical density. A new cationic resin technology which enhances image permanence.
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