If you have a USB microscope and projector, you can also investigate the fibres in a cotton ball and watch what happens when you add a drop of coloured water and a drop of soapy coloured water (if you ...
Cotton isn’t the best material for outdoor clothing, but when it’s used alone or with some other basic products, it can be a real asset when you’re in a pinch. Tim MacWelch This story was originally ...
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