Abstract: The specification discloses a method for the manufacture of a fluorescent polyphenolic product with high UV absorbance, its subsequent epoxidation, polyphenolic products, epoxidized derivatives and compositions thereof as well as laminates containing fluorescent polyphenolic products and derivatives thereof. The polyphenolic products are prepared by heating glyoxal at a temperature of about 80° C. to about 100° C. with a molar excess of a phenol in the presence of an acidic catalyst which is eliminated from the reaction mixture at a temperature below about 170° C. The total mole ratio of glyoxal to phenol charged to the reaction mixture is about 0.15 to 0.22 moles of glyoxal for each mole of phenol. The glyoxal is added continuously or by stepwise additions to the phenol so as to keep the aldehyde units in the reaction mixture to less than about 70% of the aldehyde units in the total quantity of glyoxal to be charged for making the polyphenol.

Abstract: A cloth for ink jet printing, fabricated by providing a low density cloth with a sizing agent of the gel-transition type, gel-initiating agent, and ink receiving agent for filling up gaps between fibers, and by drying the low density cloth so that even in the case where the ink-jet printing process is applied to such a low density cloth as a loosely woven or knitted fabric, a clear image can be printed thereon without ink striking through gaps between fibers, and without causing the cloth to be stained. For the low density cloth, a cloth of a single yarn weight fineness of 100 d or less, and a woven or knitted fabric of a warp density of 120 warps or less/inch or a filling density of 150 fillings or less/inch are suitable. With the use of the cloth, an ink-jet printed fabric deep in color as well as abundantly expressive of gradation (that is, having a wide range of color strength) can be obtained while preventing ink from passing through, and supporting members and the cloth from being stained.