The number of colorants used in printers is growing to improve quality of the prints in terms of gamut size, grain and metamerism. In this paper we demonstrate a modification to the existing models (Cellular Neugebauer Model, with Yule Nielson Correction) to simulate spectral reflectance of an N-ink printer. This is achieved by imposing a constraint for the media ink limit, the modified model is shown to reduce the required number of training points by as much as 97 percent. Imposing this constraint leaves us with sparse training data set and the modified Yule-Nielson Neugebauer Spectral model is shown to handle the sparse data well with average error of 1.48 ΔE₉₄.In this paper, two standard dot placement models (Dot-on-dot v.s. Demichel) are implemented and compared.