Low temperature-high speed dehydration of a high moisture content material by vertical air blowing from a narrow slit to the surface of the material moving horizontally was studied. As a part of this study, prior to drying experiment blowing out of aqueous solutions on a surface of flat plate by air blow was measured under different conditions of air velocity (νa), moving velocity of the plate (νs), viscosity of solution (μ), and initial thickness of solution (δ0). These measurements were made using several kinds of viscous oils instead of aqueous solutions to obtain the data without evaporation, and the results were compared with a model equation derived in this study. The experimental results were well correlated with a parameter ν2a/μνs, and agreed well with the model equation. On the other hand, the effect of initial load was negligible in the equation with the value of k evaluated from the experimental result. From these results, a simple approximate equation was obtained independently of initial load. This equation also agreed well with the experimental results.