Place a plastic cup under the funnel. Pour the liquid first, and then the solids into the funnel. Pour the filtered liquid down the drain, and save the solid. Using the spoon, gently squeeze off any excess liquid left in the solid. Transfer the solid from the paper filter into a plastic cup. Add one tbsp. Mix it well with a spoon. Slowly add the baking soda, mixing it well. Repeat the process until no more gas bubbles are formed.
Your glue is ready! This glue will be usable for about one day, and will then spoil. The spoiled glue can be disposed of in the trash. Before you continue with the rest of the experiment, clean up your working area. Soap and water can be used for cleaning the containers.
The coffee filter or cheesecloth or paper towel can be disposed of in the trash. How good is your glue? Use the glue you made to stick together two Popsicle sticks. Place them so that only one inch 2. Make a couple of these test samples. Repeat the same procedure using the commercial glue. Label the Popsicle sticks clearly. Wait several hours for the glue to dry. Before testing, which glue do you think will be stronger? Why do you think that?
Single-Lap-Joint Shear Test for Popsicle Sticks In the chemical industry, chemists and chemical engineers agree on standard testing methods. Have an adult help you use a single-hole punch to make two holes near the top rim of a plastic cup.
Different polymers give glues different properties — depending on the type of molecule and the length of the chain. These properties can include strength, flexibility, heat resistance, and viscosity. A higher polymer content generally gives the glue a higher viscosity and strength, with greater flexibility. Tackifying resins determine the tack and adhesive nature of the glue — how sticky it is, and how long it will stay bonded.
A lower resin content will give a tough, aggressive adhesive. Adhesives with high wax content give a tougher bond, with higher viscosity and greater flexibility. Glues with lower wax content will bond less aggressively, set faster, and have a lower viscosity. Plasticisers can be used to give more flexibility and toughness.
Glues with plasticisers can melt faster, with a lower melt viscosity. Generally, plasticisers are transparent and odourless. Did this summary help you? Yes No. Log in Social login does not work in incognito and private browsers. Please log in with your username or email to continue. No account yet? Create an account. Edit this Article. We use cookies to make wikiHow great. By using our site, you agree to our cookie policy. Cookie Settings.
Learn why people trust wikiHow. Download Article Explore this Article methods. Tips and Warnings. Things You'll Need. Related Articles. Article Summary. Author Info Last Updated: September 15, Method 1. Gather your ingredients. This simple flour glue is great to make if you are making crafts for a party or something short-term. This glue, however, will not usually last on long-term projects because it will dry out. Mix your flour and water in a bowl with a spoon.
Blend the mixture until it as thick as pancake batter. The paste should not be too thick or too drippy. If you need more glue, simply double the recipe. If you need less glue, start with the amount of flour you will use, then add water, a teaspoon at a time, until it reaches the right consistency. Cook the glue paste over medium heat until it boils. Pour your glue paste in a saucepan and stir constantly until the mixture bubbles.
Take it off the heat when the paste starts bubbling, and wait until the mixture cools before you use it. Use the glue soon after making it. You can use a brush or your fingers to apply the glue to your crafts. The glue paste can be used to stick paper together for a variety of craft projects and decorations such as making greeting cards and kids projects.
This glue can become moldy over time. To prevent mold, you should dry your craft project completely over a heater. Store in a refrigerator to reuse later.
Keep any unused glue in a tightly-sealed container in the refrigerator. The glue should last a week or two. If the glue gets dry, add a little warm water to reuse it. Method 2. You will use flour, sugar, water and vinegar to make paper mache glue.
You can adjust the recipe as needed to make more or less glue. The basic proportions are for the flour:sugar mixture. Use one teaspoon of vinegar for every cup of flour you use. If you want a smoother paste, you can sift the flour before you make your paste.
In a small saucepan, mix the flour and sugar with a spoon or whisk until well-blended. Blend the mix until it is very smooth and lump-free. It will have the consistency of a thick paste. Blend your ingredients until your glue is smooth and a little runny but not watery. Your paste should not be too thick or too drippy. Cook over medium heat. Pour your mixture in your saucepan and turn on the heat. Stir the mixture constantly until the mixture begins to thicken.
Once your mixture starts to boil, you can turn off the heat. Let your glue cool before using it. When the mixture has cooled, use it for any craft projects including paper mache.
Once you have finished, keep any unused glue in a tightly-sealed container in the refrigerator. This glue will keep for 2 to 4 weeks in the refrigerator. Glue something! When cooled, you can use this glue to make paper mache, craft projects, and anything else. It's totally non-toxic, too.
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