Does anyone knows any method of bending an acrylic tube without distortion and maintaining it's original diameter?
you could check the next time you are at the store(s) you probably bought it from and see if you see the matching yarnthen just read the label to see what kind it is.
I'd also look around on eBay and see if you can identify any pictures there as what you haveYou could also take photos of them and post links here to see if anyone knows what they are Is it in skeins or rolls or what? That can also help identify certain types of yarnIf Aunt Mary already made them all into regular handwound yarn balls, however, this test is pointless.
There's really no way of tellingWhat you might could do is cut off a small strand of it and take it to the store to compare against the yarn they haveBut it is probably a different dye lot and they might not carry the same thing anymoreI hope this helped
I can usually tell by touching the yarnI am pretty accurate, but can't tell the difference between 25% or 30% nylon in a yarn, but can tell if it is wool, or cotton, or alpaca, or ackrlic, or something elseAfter a while, you will get experience with the different fibresA friend of mine can smell silk just by walking down the isle in a storeI'm not that good, but can know silk by touching itYou can do the burn test - google it (yahoo is being stupid tonight) to tell if it is protein or plant or synthetic materialBleach will dissolve wool very fast, and it should dissolve silk too, as well as most protein (animal) fibresIt will remove colour from cotton, but won't do anything to synthetics.
