{"product_id":"educational-colours-plaster-of-paris-3kg-fine-white-casting-plaster","title":"Educational Colours Plaster of Paris 3kg Fine White Casting Plaster","description":"\u003ch2\u003eThree kilos of fine white plaster, and the numbers you actually need\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003e3kg. Fine white pottery plaster. Approximately 2.5 litres of volume once mixed. Working time 10 minutes. Sets hard in 2-4 hours. $17.50.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eTen minutes of working time is the number that runs the lesson.\u003c\/strong\u003e From the moment it is mixed you have ten minutes before it starts to go off. Have the moulds out, the class ready and the water measured before you open the bag.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e2.5 litres from 3kg\u003c\/strong\u003e lets you work out how many casts you get before you buy, instead of guessing.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFine powder, fine finish.\u003c\/strong\u003e A cheap coarse plaster gives a gritty cast that will not take detail and chips at the edges. This is the reason to buy a plaster made for casting rather than a builder's bag.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIt will not crack easily\u003c\/strong\u003e - the supplier's own claim, and the practical difference between a cast that survives being taken home and one that does not.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eLeave it overnight\u003c\/strong\u003e if you can. It hardens in 2-4 hours; it is fully set the next morning.\u003c\/p\u003e\u003ch2\u003eHandling - read this before a class uses it\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eWear a dust mask when mixing.\u003c\/strong\u003e The supplier says to use one with any powdered substance and we are repeating it. Fine powder plus a room full of children is worth ten seconds of preparation.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eNever pour plaster down a drain or a sink.\u003c\/strong\u003e It sets in the pipe. Wash hands in a bucket and tip the waste outside, or you will be paying a plumber more than the plaster cost.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWash hands after use.\u003c\/strong\u003e Store somewhere dry and well ventilated - plaster that has taken up moisture will not set properly.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eNo safety data sheet came with our price list.\u003c\/strong\u003e\u003cstrong\u003eWe have asked for one\u003c\/strong\u003e, because a powder that a class mixes deserves one on file.\u003c\/p\u003e","brand":"Educational Colours","offers":[{"title":"Default Title","offer_id":53793405305195,"sku":"EVPLAST3","price":17.5,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0963\/2795\/8891\/files\/PLAST3.jpg?v=1788370557","url":"https:\/\/megaofficesupplies.com.au\/products\/educational-colours-plaster-of-paris-3kg-fine-white-casting-plaster","provider":"Mega Office Supplies","version":"1.0","type":"link"}