Exact and approximate models were proposed for the convective drying of a slurry coating with low particle concentration in polymer solution, and particle exposure on the dried surface (surface coverage) was estimated. The exact model was derived from the Maxwell. Stefan equation of ternary component coating, and the approximate model was derived by assuming a rectangular profile of moisture content. A critical value of moisture content uAC was assumed in both models. The particle component, which is stagnant in the high moisture content region, begins to move with the same velocity as the polymer component at uAC. The surface coverage estimated by computer simulation based on the strict model was compared with the measured value of the coverage published in a previous study, and the validity of the assumption of uAC was shown. This result suggests a new mechanism of particle movement, namely, that particles move with tangled polymer molecules in concentrated polymer solution. A series of computer simulations based on the two convective drying models was performed. The simulated result showed that the coverage increased with increasing initial moisture content and with decreasing uAC. For particles of 1.6 mu m or more in diameter, the coverage shows a constant value of less than 1 when the dried polymer is over 10 mu m in thickness only in the case of the strict model, while the approximate model is suggested to be useful only in limited conditions. When particle diameter is under 1.6 mu m, however, the coverage shows a constant value of about 1 in the case of the strict model, and the results of both models agree well.