There is disclosed a bio-based artificial leather composition, which includes a base layer having a first polymerized epoxidized vegetable oil. The composition also includes a foam layer attached to the base layer and having a second polymerized epoxidized vegetable oil. The bio-based artificial leather also includes a fabric layer attached to the foam layer. There is also disclosed a method of preparing a bio-based artificial leather composition including the step of providing a first epoxidized vegetable oil and polymerizing the epoxidized vegetable oil to form a base layer. The method also includes the step of providing a second epoxidized vegetable oil and curing the second epoxidized vegetable oil with an anhydride and foaming agent to form a foam layer. The base layer is attached to the foam layer. A fabric layer is attached to the foam layer.

An object is to provide an epoxy resin composition for resin transfer molding (RTM) having a low viscosity and low volatility and excellent in balance among elastic modulus at the time of wet heating, heat resistance at the time of wetting, and fracture toughness of a cured resin of the epoxy resin composition, and to provide a large fiber-reinforced composite material having a high Vf and including the epoxy resin composition. An epoxy resin composition for RTM including a component [A], a component [B], and a component [C] described below: [A] a tetrafunctional glycidyl amine type epoxy resin, [B] at least one aromatic amine curing agent selected from the group consisting of an alkylbenzenediamine and a methylenebisaniline, [C] an aniline type epoxy resin represented by Formula (I):

##STR00001## wherein R.sup.1 and R.sup.2 each represent at least one selected from aliphatic hydrocarbon groups having a carbon number of 1 or more and 4 or less, in a case where a plurality of R's are present, the plurality of R's are identical or different, in a case where a plurality of R.sup.2s are present, the plurality of R.sup.2s are identical or different, n is an integer of 0 or more and 4 or less, m is an integer of 0 or more and 5 or less, and X represents O or S, the epoxy resin composition for RTM satisfying all of Condition 1 to Condition 4 described below: Condition 1: in the epoxy resin composition for RTM, a viscosity at 110 C. is 1 mPa.Math.s or more and 200 mPa.Math.s or less, Condition 2: in the epoxy resin composition for RTM, a mass reduction rate after heating the epoxy resin composition for RTM at 110 C. for 30 minutes is 0.3 mass % or less, Condition 3: a cured resin obtained by curing the epoxy resin composition for RTM at 180 C. for 2 hours has a rubbery state elastic modulus of 2 MPa or more and 8 MPa or less, Condition 4: a cured resin obtained by curing the epoxy resin composition for RTM at 180 C. for 2 hours has a water absorption coefficient of 1% or more and 3% or less.