The scattering of light within paper and the ink penetration in the substrate are the key factors which affect the color
reproduction. A reflectance model for color halftone prints is introduced in this paper which considers these factors. The
model is obtained by the extended Murray-Davies model and iterative algorithm. The model described in this paper
contains two parameters, <i>n</i> and <i>v</i> . The <i>n</i> factor equals to the sum of <i>w</i> and <i>v</i> . The w factor relates to the
optical spread function of paper relative to the spatial frequency of the halftone dots. The <i>v</i> factor relates to the
distribution of colorant within the dots. The value of <i>n</i> and <i>v</i> are obtained by simulation according to the
experimental data. For offset lithographic halftone data at 150lpi, the value of n and v are 1.578 and 0.02, thermal
wax transfer halftone ( <i>n</i> =2.292, v =0.0209) and stochastic halftone ( <i>n</i> =1.1853, v =-0.006).