Abstract: According to one embodiment, there is provided an instant green tea which contains a dry green tea extract, a drying auxiliary agent, antioxidants, a tea powder and a specific amount of potassium, and a method of producing the instant green tea includes the step of extracting tea leaves with an extraction solvent which contains a drying auxiliary agent and a first antioxidant and has been adjusted to a pH value within the neutral range by using a first potassium preparation to give a liquid extract, the step of adding a second antioxidant and a tea powder to the liquid extract thus obtained, and the step of drying the liquid extract after the completion of the addition step as described above.

Abstract: It is an object of the present invention to provide a packaged high-concentration rutin-containing drink suppressed the occurrence of the precipitation though it contains rutin in a high concentration. According to the invention, a packaged high-concentration rutin-containing drink includes rutin and quercetin is provided. The concentration of rutin is in a range from 70 to 1100 ppm and the ratio [(A)/(B)] by weight of (A) rutin to (B) quercetin is 3.7 to 58.0.

Abstract: The present invention provides roasted barley from which barley tea having excellent aroma, sweetness and richness and so on can be extracted. Roasted barley characterized by having a measured void content of 1.5 ml to 2.5 ml. The above-described roasted barley can be produced by a production method which involves a rapid cooling step, wherein the material temperature of barley is rapidly lowered to 60 to 130° C. within 5 seconds, between a primary roasting step and a secondary roasting step. It is preferred to further employ a slow cooling step, wherein the material temperature of the barley is maintained at 80 to 140° C. over 16 to 120 seconds, after the secondary roasting step.

Abstract: According to one embodiment, there is provided an instant green tea which comprises a dry green tea extract, a drying auxiliary agent, antioxidants, a tea powder and a specific amount of potassium, and a method of producing the instant green tea includes the step of extracting tea leaves with an extraction solvent which contains a drying auxiliary agent and a first antioxidant and has been adjusted to a pH value within the neutral range by using a first potassium preparation to give a liquid extract, the step of adding a second antioxidant and a tea powder to the liquid extract thus obtained, and the step of drying the liquid extract after the completion of the addition step as described above.

Abstract: It is an object of the invention provides a method of manufacturing a tea beverage having an excellent aroma. The invention provides a method of manufacturing a tea beverage, which comprises the steps of preparing an extract of tea leaves containing 40 ppm-210 ppm of theanine, bringing the extract of tea leaves thus prepared into an anaerobic condition, heat-treating the extract of tea leaves in the state of anaerobic condition at a temperature of not lower than 100° C. under tightly sealed, and filling the extract of tea leaves thus heat-treated into a hermetically sealed container.

Abstract: A coating composition contains as essential components one or more antifoulants and copolymer obtained from monomers mixture comprising monomer A represented by formula (1): ##STR1## wherein R.sup.1 to R.sup.3 each is a group selected from alkyl groups and aryl groups and may be the same or different, and X is an acryloyloxy group, a methacryloyloxy group, a maleinoyloxy group, or a fumaroyloxy group and monomer B represented by formula (2):Y--(CH.sub.2 CH.sub.2 O).sub.n --R.sup.4 (2)wherein R.sup.4 is an alkyl group or an aryl group, Y is an acryloyloxy group, a methacryloyloxy group, a maleinoyloxy group, or a fumaroyloxy group, and n is an integer of 1 to 25.