12/29/2023 0 Comments Cobalt chloride weather indicator![]() Using the Dr圜ard in conjunction with the drying process requires a different procedure to accurately determine product dryness. How to use the Dr圜ard when drying food products Do not remove the strip from the card or leach the cobalt chloride by placing it in water. The indicator strip contains cobalt chloride. Store the card in a plastic bag to prevent accidental contact with water or high humidity conditions (near 100% relative humidity), which will make the card difficult to read. If the Dr圜ard indicates the product is too wet to be stored safely, then the product should be used immediately or dried further before storage.ĭr圜ard is reusable: A Dr圜ard can be reused many times. If the strip turns blue or grey, then the product is adequately dried. If the indicator strip on the card turns pink, then the product is too wet for safe storage. The card will display an estimate of the relative humidity within the sealed container in approximately 30–60 minutes, and waiting for 2 hours will provide a more accurate measure. Place the Dr圜ard and a sample of the dried product in a moisture tight container, such as a sealed plastic bag or a jar. How do you measure dryness, with the the Dr圜ard ![]() Please sign up to express your interest in working with us. ![]() The Horticulture Innovation Lab team continues to work with partners to test and improve the Dr圜ard in real-world situations and to explore options for making this tool more widely available. Visit the Dr圜ard sign-ups to register your interest and to receive notifications as the Dr圜ard becomes more widely available. Conducting research related to the Dr圜ard?.Manufacturing and/or selling the Dr圜ard?.Distributing the Dr圜ard through your organization?.To be on the safer side use common salt in place of cobalt chloride. If you are using cobalt chloride in making this, then handle it with care(as this is a laboratory chemical), it may cause allergy in some cases so it is better to take the help of some elder. If you have used cobalt chloride the flower will turn blue on a wet day. In fine weather the flower will be white with the dry salt crystals, but on a rainy day and damp weather, the flower petals will turn deep pink. The petals of this flower will change colors indicating impending weather. Soak the pink blotting paper in saturated salt solution or cobalt chloride solution.Īfter drying your own weather forecaster is now ready to use. Fix a few green colored leaves to the stem in order to make it as real as possible. Arrange them according to size keeping the smallest on the top and the biggest below them, with the help of a wire fix them up so that the wire acts as the stem of the flower. Cut the blotting paper into petal shaped pieces of varying sizes from small to bigger ones. Make a flower form out of a pink colored blotting paper. Common salt or cobalt chloride (easily available in chemist store or get it from your school laboratory)ĭissolve common salt or cobalt chloride in some water to make a saturated solution. This project can be used as your class project or in the science fair of your school. Here is a project to make your own weather indicator.
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