The properties of railway ballast material are affected by the local geologies and climatic environments from which parent rock is sourced. These factors can make it challenging to select most appropriate for applications. To address this issue, paper first reviews means selection in complex across world. criteria materials compared test methods quality quantification summarised. Next, types im...

Material jetting (MJT) products have a high subjective appearance quality in additive manufacturing (AM). MJT objects are typically manufactured from multiple layers of semi-transparent photo resins to achieve the desired appearance. This study explores optical properties photopolymer plates monolayer and bilayer combinations. The role white substrate as background plate configurations is discu...