The current trend in depletion of wood fuel resources in developing countries can be addressed by the development of alternative fuels which exploit the abundant biowaste resource. Amongst the available technologies, briquetting has been established as a viable means of converting biowaste to fuel. In this study, samples of rice straw were densified under a die pressure range of 20-140 MPa.. Analysis of the briquettes showed that the physical characteristics (elongation and voidage) and, hence, combustion characteristics of the briquettes formed depend on several factors, among which the die pressure is prominent. It can he concluded that, for any given die size and storage conditions, there is an ideal die pressure for biomass densification and, in this case, this was found to occur at about 80 MPa.