So, a few of us got together yesterday for lunch. One of the topics that came up was, how much a PITA it is to use cotton balls for micro coils. Hard to get it to strand, etc. Pokerplayer has a solution in using some cotton balls from Target. He says, they come stranded and are easier to pull to the right diameter for pulling through micro coils. I will be giving this a try as soon as I can get to Target. Also, the organic cotton being advertised on this forum, got me thinking about it also.
On the way home though, I was thinking of some cotton I purchased a little while back. This was before I started doing micro coils. It was a pain to wrap, because cotton is so flimsy. But it may be easier to use with a micro coil.
This is what I came up with. This is my mostly standard micro coil. 2 coils of 10 wraps on 2mm 14gauge blunt needle for a .75ohm build. The cotton used is butcher's twine.
The twine has 16 strands of cotton twisted into the twine. For my 2mm coils, I found that 8 strands folded over would pull through the micro coil without deforming the coil, but was still tight enough. I used a piece of 28 Kanthal, bent in half, to pull the twine through the micro coil. It was a little harder to stuff it in around everything, but was immensely easier to use, over all, than cotton balls. This build was done on a iGo-W. It needed new coils anyway. The picture above was taken after the 2 dripping sessions. The first session was a little harsh. 2 session was better. After that, for me anyway, it is as good as my cotton balls. I doesn't absorb quite as well as cotton balls, probably because twine is denser, but it does the job.
This is the twine I purchased. Butcher's twine is used to tie up roast and poultry. I couldn't find out if it is sterile or not, but being used on food, I figured it was probably ok. I will find out if I get some unknown disease. 370ft for about 7 dollars. It is about 3mm in diameter. Hard to measure, because it is so flimsy. You have to watch when you buy this twine, because some butcher's twine out there comes with polyester in it. I got this at Lazy Acres Market.
Give it a try, and let me know what you think.