Abstract: Curable formulations which form cured materials that are breakable upon immersion in water are disclosed. The cured materials break into a plurality of particles being a few millimeters or less in size. Methods of fabricating three-dimensional objects utilizing the curable formulations are also disclosed, as well as model objects fabricated thereby. The curable formulations include at least a mono-functional curable material and a multi-functional curable material, as described in the specification.

Abstract: Novel cleaning compositions, usable for removing a cured support material from a printed object obtained by additive manufacturing such as 3D inkjet printing are provided. The cleaning compositions are aqueous alkaline compositions containing a combination of two alkaline substances: an alkali metal hydroxide and an alkali metal silicate, each at a concentration of no more than 3 weight percents of the total weight of the composition. The cleaning compositions are characterized by high and constant dissolution rate, and are particularly useful for removing a cured support material that includes cross-linked polymeric chains such as cross-linked polyacrylate chains. Kits comprising the alkaline substances, and methods of fabricating a three-dimensional model object which utilize the cleaning compositions or the kits, and a three-dimensional model object fabricated thereby, are also provided.

Abstract: Novel support material formulations, characterized as providing a cured support material with improved dissolution rate, while maintaining sufficient mechanical strength, are disclosed. The formulations comprise a water-miscible non-curable polymer, a first water-miscible, curable material and a second, water-miscible material that is selected capable of interfering with intermolecular interactions between polymeric chains formed upon exposing the first water-miscible material to curing energy. Methods of fabricating a three-dimensional object, and a three-dimensional object fabricated thereby are also disclosed.

Abstract: Methods are disclosed involving the formation of complex DNA-Metal and the detection of the complex, such as by employing several analytical methods, e.g., X-Ray Fluorescence, FT-IR and Raman spectroscopy.