Monocure 3D RAPID photo-reactive clear resin has been designed to use in low powered LED type DLP 3D Printers for UV wavelengths up to 420nm. The transparent appearance allows you to see internal features that would be useful for research, prototyping and engineering parts All Monocure 3D resins have a very wide range of reactivity, UV wavelengths of 225nm to wavelengths of 420nm. By incorporating a blend of photo-initiators, monomers & sensitizers, almost any UV light source can be used to initiate the polymerisation process of our resins Our resins have been tested with a 'Shore D Hardness Durometer' and have a rating of 70. (A hard hat has a rating of 80) The Viscosity of our resin is 500 - 600cps @ 25°C (Brookfield RVT) All our resins have a low odour, have zero VOC emissions and display very low shrinkage properties <0.5%>