Composite materials are materials that are combinations of at least two different materials or phases. Jute is a plant that can also be utilized as a composite reinforcing phase to form a composite structure. Recently jute composites are preferred in many areas because of their low cost, low density, ease of availability and renewability. Thermoplastic and thermoset resins can be used as matrix phase to form a jute composite.     In this experimental study; epoxy and polyester resins were combined with several woven jute plies to form composite laminate. Plies were treated first with 2.4 liters of deionized water and 240 grams sodium hydroxide for 4 hours. After this step, 6 liters of deionized water and 10 % diluted acetic acid were applied to woven ply. Before and after these chemical steps, microstructure changes were observed by the help of an optical microscope. Resin and hardener of polyester and epoxy polymers were prepared in specific ratios before applied to jute fibers. These mixtures were applied to fabric plies by hand lay – up method. After applying polymer mixtures to laminated fabrics, hot press machine was used at 100 °C, 4 hours and 0.5 ton pressure.      Thickness of the plies was measured before and after the chemical treatment and also after the curing process and hardness of the cured laminate was also measured by using Durometer. Microstructural changes of jute fibers in terms of dimensions were analyzed to see if the chemical treatment played a role in the dimensional changes. Investigation of microstructural changes and physical properties of jute fibers before and after treatment of sodium hydroxide and acetic acid is one of the main focus of this research. It was observed that thicknesses of jute fabric plies were increased after treatment by sodium hydroxide and acetic acid treatment. According to the study, treatment of jute fabric plies with sodium hydroxide has increased their length while treatment of the same fabrics by acetic acid after the sodium hydroxide treatment decreased the same dimension.