FINE CELLULOSE FIBER-CONTAINING DRY SOLID， AND FINE CELLULOSE FIBER RE-DISPERSION LIQUID

PROBLEM TO BE SOLVED: To provide a fine cellulose fiber-containing dry solid having excellent re-dispersibility in solvent such as water， and provide a fine cellulose fiber re-dispersion liquid having excellent transparency and viscosity properties. SOLUTION: A fine cellulose fiber-containing dry solid contains a fine cellulose fiber with an amount of sulfur introduction in terms of a sulfo group of 0.5 mmol/g or more. A fine cellulose fiber re-dispersion liquid has the fine cellulose fiber re-dispersion liquid and water and has excellent re-dispersibility in terms of transparency， viscosity properties， and precipitation properties. SELECTED DRAWING: Figure 1