I posted a question about this and can't find it now. I have some Orlon, which is made from the natural gas industry and it says, "MOTH PROOF" on the label. Orlon is a petrol product, and there's no way a moth would eat it, so why do they put Moth Proof on it? Seems like deceptive advertising, or have they actually put pesticides on it? There would be no reason to, because it would be naturally moth proof. Moths like wool, not petrol. Does anybody know more about this? TY
Chances are that the yarn you have dates from the days when synthetic yarns were the exception - not the rule (c. 1950s), and most hand-knitting yarn
wool. So, no - strictly speaking - it's not deceptive advertizing. It was just a means to let the customers - used to only having wool yarn - know that there was a moth-proof alternative. I dare you to find the words moth-proof on any ball of yarn made within the last few decades.
I found the topic you created. You can find it too. Just click on your name to go to your profile. Then click on Topics. It's right there.