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I'm thinking that's the problem Paul. Thanks :)

Thanks for all the help. I did notice that the cyclohexane solution had a lumpy deposit on the bottom of the bottle. I've made use new solutions increasing the concentrations, excellent result first time round, then back to 'normal', with the nylon layer looking like it's fragmenting. Only...

Hi all, We've been trying to do the nylon rope trick, nylon is produced but it won't form a long strand. It looks like the film layer is breaking into small chunks when we try to pull it out. Everything is fresh apart from the cyclohexane, which was an old but unopened bottle; apparently shelf...