Processes and techniques which may result in a gas accumulation. The following circumstances may result in the unintentional build-up of asphyxiant gases in confined spaces. During MIG, MAG or TIG welding on the outside of fabrications, torch shielding gas can enter the fabrication through the weld root.
So here's how to make paper mache glue from water and flour so they can get their hands messy. What you need. Activity. Mix one part flour with one part of water (eg, 1 cup flour and 1 cup water, or 1/2 cup flour and 1/2 cup water) until you get a thick glue-like consistency. Add a bit more water if itâs too thick. Mix well with a spoon to get rid of all the lumps.
Making a plastic from potato starch â. making the plastic. In this activity you will make a plastic film from potato starch and test its properties. Potato starch is a polymer made of long chains of glucose units joined together. It actually. contains two polymers: â Amylose, which is a straight chain of glucose units. â Amylopectin, which is a branched polymer, also made of glucose units. The amylopectin prevents the starch from becoming plastic-like.