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Determination of corrected main process parameters procedure in the strip ironing process with double side thinning, as well as appropriate experimental results are presented in this paper. Given is modified analysis for friction coefficient and contact pressure determination. Classical common so called “Schlosser model” is not suitable in many cases, and give unreal values for both of main process parameters. Formulas obtained here were verified in suitable examples which are, also, presented in the paper. Verification was performed on the base of experimental results. Realised was the single and four phase process of mild steel DC04 sheet stripes drawing. Stripes were 20 mm wide and 2.5 mm thick. Lateral force intensities were 5, 10 and 15 kN. Maximal obtained thinning deformation in one phase was about 17%. Appropriate lubrication with mineral oil and grease was used in conditions of lower speed of 20 mm/min. Results shows that proposed corrected parameters enables more precise process monitoring and precise quantification of lateral force, contact pressure and thinning strain influence on friction. © 2019, Faculty of Engineering, University of Kragujevac. All rights reserved.