Rapid Prototyping involved creating a working model of various parts of the system at a very early stage, after a relatively short investigation. The method used in building it is usually quite informal, the most important factor being the speed with which the model is provided.
There are water-and solvent-based -- also called oil-based -- polyurethane varnishes. Water-based polyurethanes are more environmentally friendly and safer to use than solvent-based, but they are not as resistant to wear and tear as solvent-based products.
(Polyvinyl Acetate). There is a growing demand for adhesive and glue-based emulsion polymers with many manufacturers switching from solvent-based adhesives to water-based adhesives.There are a number of benefits that include, aside from reduction of costs, the absence of flammable substances, reduction of risk, and easier handling.Polyvinyl Acetate). There is a growing demand for adhesive and glue-based emulsion polymers with many manufacturers switching from solvent-based adhesives to water-based adhesives.