COMPOSITION D'AGENT ÉPAISSISSANT, PROCÉDÉ PERMETTANT D'ÉPAISSIR UNE SOLUTION AQUEUSE ET PROCÉDÉ PERMETTANT DE RÉGLER LA VISCOSITÉ D'UNE SOLUTION AQUEUSE
Provided is a thickening agent composition in which a synthetic thickening material, a natural thickening material or a derivative thereof, which has been widely used previously, is contained as the main thickening component and a specific thickening component is also contained, and which, even when used in a small amount, can provide a high viscosity that could not be achieved if only one of the thickening components is contained in the composition. Also provided are: a thickening method for greatly improving the viscosity of an aqueous solution using a small amount of a thickening agent composition； and a method for controlling the viscosity of an aqueous solution employing the thickening method.The thickening agent composition comprises a first thickening component that is added for the purpose of increasing the viscosity of water and a second thickening component that is produced using a plant belonging to the genus Corchorus as a raw material, wherein the weight ratio of the second thickening component is 1.5% to 60% relative to the whole amount of the composition comprising the first thickening component and the second thickening component. By employing thus constitution, the viscosity of a mixed aqueous solution, i.e., an aqueous solution in which the composition is dissolved, can be increased by two folds or more compared with the viscosity of a single-component aqueous solution, i.e., an aqueous solution in which only the first thickening component is dissolved at the same concentration as that in the mixed aqueous solution.L'invention porte sur une composition d'agent épaississant qui contient, en tant que constituant épaississant principal, une substance épaississante synthétique, une substance épaississante naturelle ou un dérivé de celles-ci, qui a été largement utilisé auparavant, un constituant épaississant particulier étant également contenu, et qui, même lorsqu'elle est utilisée en petite quantité, permet de fournir une haute viscosité qui ne pour
