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 ARCHIVED TOPIC: Straightening Coiled Ivoroid Binding


Please note this is an archived topic, so it is locked and unable to be replied to. You may, however, start a new topic and refer to this topic with a link: http://www.banjohangout.org/archive/350678

northernbelle - Posted - 01/29/2019:  12:36:27


I have a "coil" of 1970's StewMac Ivoroid grained

binding that's been coiled for 40 years. What is

the best/fastest way to get it to lie flat and straight

before gluing to a neck channel?  Assuming either Duco or Super Glue to attatch?



Was ABS used 40 years ago for grained ivoroid?

Thanks, Jim


Edited by - northernbelle on 01/29/2019 12:50:01

Quickstep192 - Posted - 01/29/2019:  12:51:49


I put a heavy duty binding clip on each end. Then, I hung one clip onto a nail in an overheard joist and tided some nuts to the other end for weight. I let it hang until it got mostly straight. But, mine hadn't been coiled for 40 years!

Dan Drabek - Posted - 01/29/2019:  14:04:03


quote:

Originally posted by Quickstep192

I put a heavy duty binding clip on each end. Then, I hung one clip onto a nail in an overheard joist and tided some nuts to the other end for weight. I let it hang until it got mostly straight. But, mine hadn't been coiled for 40 years!






I've done exactly the same thing, but for weight, I clamped a heavy C clamp to the bottom end. I dipped mine in hot water before hanging it up, but it's probably not necessary.



I would be cautious about using 40 year old celluloid unless I were restoring a vintage banjo and wanted total authenticity. Old celluloid has a bad track record of disintegrating over time. If your's is that old and still survives, you might be very lucky, or had it stored in an airtight container?



DD

vintagetenor - Posted - 01/29/2019:  14:12:33


I would think using a hair dryer on it would relax it.

vintagetenor - Posted - 01/29/2019:  14:14:53


Submerging celluloid thumbpicks in hot water also relaxes the curve in order to make them a larger size. Maybe it'll work on your binding.

Quickstep192 - Posted - 01/29/2019:  15:08:07


I don't know about a hair dryer, but a heat gun was too much heat. It deformed the binding when I tried it.

I think I'd try hot water and hanging.

Quickstep192 - Posted - 01/29/2019:  15:11:36


The last time I did binding, I used this stuff from LMII. I don't have enough experience to know if it's the best thing out there, but it worked very well for me.

lmii.com/glue/2944-contact-adh...2-oz.html

banjoflatpkr - Posted - 01/29/2019:  15:40:15


Binding must be pretty thick to have to straighten it before using. I’ve never had to straighten it before use.
I just apply binding glue to channel, apply binding and tape in place. The glue will soften the binding enough so that it is easy to tape in place.
Jim

Dan Drabek - Posted - 01/29/2019:  15:47:13


quote:

Originally posted by banjoflatpkr

Binding must be pretty thick to have to straighten it before using. I’ve never had to straighten it before use.

I just apply binding glue to channel, apply binding and tape in place. The glue will soften the binding enough so that it is easy to tape in place.

Jim






I don't usually straighten it either, but a couple of times, with fairly thick celluloid that had been stored wound in a tight curl, it was like wrestling a basket of snakes.  Gluing it in place wasn't so much the problem as was splitting it lengthwise on the bandsaw. A little heat and weight made it much easier to handle. For me. 



DD

banjoflatpkr - Posted - 01/29/2019:  16:21:36


If I have to cut it down some on a band saw, I tack glue it to some scrap thin plywood before running it through the saw.

Dan Drabek - Posted - 01/29/2019:  16:26:14


quote:

Originally posted by banjoflatpkr

If I have to cut it down some on a band saw, I tack glue it to some scrap thin plywood before running it through the saw.






That's a good solution.



DD

banjoflatpkr - Posted - 01/29/2019:  17:31:04


The double stick tape that SteMac sells works well to light tack the binding to plywood and many others uses.
Jim

northernbelle - Posted - 01/29/2019:  17:50:17


Thanks guys. I was going to try a hair dryer then a heat gun. Sounds like the heat gun is too much. I'll likely try heating them in water lst and clamp hanging them.
It is not celluloid binding but an Ivory colored, grained plastic. I bought it in 1980 so wondered if it was ABS that "early". It was stored in a cardboard box. I'll probably give StewMac a call and ask to be sure what it is.
I'm considering using wood binding instead as the gluing is so much easier with Titebond and this coil may not be usable without contortions. Wrestling a bag of snakes is a good description of how coiled this coil is!
If I undo it, it has recoil memory that snaps as fast as a clam shell snaps shut!

Thanks for the help guys, NB Jim

northernbelle - Posted - 01/29/2019:  18:49:14


My memory was likely faulty regarding my coiled Ivoroid. According to StewMacs
current catalog the grained Ivoroid is indeed celluloid. It may indeed end up being too brittle in which case I'll go with wood instead.
Thanks again. NB Jim

Quickstep192 - Posted - 01/30/2019:  11:50:57


I don't want to necessarily influence your decision, but the last banjo I made has plastic binding.
It was only after I had reached to point of no return that I realized that it would have looked soooooo much prettier with wood binding.

It would also have avoided the snake wrangling.

northernbelle - Posted - 01/30/2019:  17:25:50


Quickstep, I'm seriously considering figured maple instead. There's a Grizzly Tools store near me that supplies some guitar luthier supplies and I'll see what they have in stock sometime in the next few days.

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