NOVELTY - A curable liquid carbon precursor formulation (10) (C1) comprises a) at least one aromatic epoxy resin; b)(i) at least one aromatic co-reactive curing agent, and/or (b)(ii) at least one catalytic curing agent; and (c) at least one porogen (12); where liquid composition has a neat viscosity of less than 10000 mPas, at 25 degrees C, prior to adding porogen, prior to adding optional components, prior to curing, and prior to carbonizing; and the composition being cured has a carbon yield of at least 35 wt.% disregarding the weight of porogen and any optional components present in composition.    USE - As curable liquid carbon precursor formulation for preparing a porous carbon composition for making cured porous article or carbonized porous carbon composition article e.g. thermal insulation material; for manufacture of various porous carbon composition articles (claimed) e.g. for electronic devices, semiconductors, thermal insulation and conductors, construction materials, electrochemical storage, layer products, high-temperature thermal insulation, high thermally conductive heat sinks, electrodes for energy storage, energy absorption material, catalyst supports and filters, high temperature insulation, fuel cell electrodes, heat exchangers, brake disks, engine components, and bone surgery materials.    ADVANTAGE - The liquid composition has a neat viscosity of less than 10000 mPas, at 25 degrees C prior to adding porogen, prior to adding optional components, prior to curing, and prior to carbonizing; and the composition being cured has a carbon yield of at least 35 wt.% disregarding the weight of porogen and any optional components present in composition. The cured carbon precursor composition has a carbon yield of at least 35 wt.% as measured in the absence of porogen and any optional components. The low viscosity formulation (lower than 10000 mPas) can be used without having to dilute the formulation with a solvent to obtain the low viscosity. In addition, the formulation shows good affinity to carbon surfaces and ultimately provides a high carbon yield (e.g. higher than 35%). The process for preparing the carbon-carbon composite is beneficial because the use of the low viscosity formulation reduces the number of densification cycles (typically, by at least one cycle) to deliver a uniformly densified carbon-carbon composite (i.e. a composite with no interphase transition between carbon matrix such as carbon fibers and impregnated resin) as well as a carbon-carbon composite with minimum porosity when densified (typically, above 10 lbs/cubic feet). The low viscosity of the curable liquid carbon precursor composition enables a processable amount of resin pick-up by the carbon matrix such as carbon fibers. In addition to having a low viscosity, the curable liquid carbon precursor composition, prior to curing, has a surface tension that can be from 10-70 mN/m at 25 degrees C. The curable liquid carbon precursor composition has a wettability property sufficient to easily and efficiently wet the surface of a carbon substrate or member, that is, the liquid precursor has affinity between a liquid and a surface translating into the ability of the liquid to spread on the surface of the substrate. The carbonized composition has low amount of impurities e.g. metals and non-metals. The porous carbon composition shows good density, insulation properties, adsorptive properties, structural strength, purity (ash content), pressure drop, permeability, and processability.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following:    (1) a cured carbon precursor composition (C2) for preparing a porous carbon composition comprising a cured reaction product of a curable liquid carbon precursor formulation (C1);    (2) a porous carbon composition (C3) comprising a carbonized reaction product of a cured composition prepared from a curable liquid carbon precursor formulation (C1);    (3) preparing (P1) a cured carbon precursor composition involving I) providing the curable liquid carbon precursor formulation (C1), and II) curing the formulation (C1) to form a cured carbon precursor composition;    (4) preparing (P2) the porous carbon composition involving I) providing the curable liquid carbon precursor formulation (C1), II) curing the formulation (C1) to form a cured carbon precursor composition, and III) carbonizing the cured carbon precursor composition to form a porous carbon composition;    (5) a cured porous article prepared by the process (P1); and    (6) a carbonized porous carbon composition article prepared by the process (P2).    DESCRIPTION OF DRAWING(S) - The figure shows a schematic illustration showing a liquid composition sample containing particles of porogens before curing the liquid composition.    Curable liquid carbon precursor formulation (10)    Liquid matrix (11)    Porogen particles (12)