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Word Count: 253
Supplies Borax from the supermarket or a small box from laundromat Elmers Glue-All White only Food Coloring optional Water One large plastic jar wscrew lid - ala a large peanut butter jar One plain old cup Instructions Step 1 Add together 13 cup Elmers Glue 13 cup Water Food coloring Shake stir or mix these ingredients until glue dissolves in water Step 2 Fill an empty cup with 13 cup of water Slowly pour in 2 tablespoons of borax allow to settle for a minute Pour off excess water and discard the water Step 3 Scrape the wet borax B into the jar with mix A close lid Shake like crazy oh yeah shake the jar too Shake until the slosh slosh becomes thump thump Open and remove the guk you can scrap extra from the sides Now play It may stain things could get stuck in carpets who knows The Science Elmers glue is copolymer polyvinylalcohol PVA a plastic made from oil Borax is a natural mineral mined from the earth made of boron sodium oxygen and water When you add water to elmers glue the PVA being unstable starts to dissolve in the water When you add the wet borax it is slightly acidic and it reacts with the PVA to crosslink This crosslinking causes the guk to undergo an irreversible gelation reaction much like when an egg boils to become a hard boiled egg It is safe to handle but hey lets not eat itOK
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