Modification Neck Mod (Lengthening)

I would search the term “neck doughnut” for what you’re looking for—and I would advise you to try out the search feature on DoA—a lot of the things you’re creating threads for have been discussed in other places, like pictures of Dollmore trinities and lusions—you can find a lot of what you’re looking for on here!!

To lengthen a neck without permanently altering the resin, all you’d want to do is either get a neck doughnut, which is a little piece of resin that would put more space between the top of the neck and the head’s socket, or put in a kip (which is a flexible silicone disc that increases friction to improve joint movement!) or hot glue suede the crap out of the socket on the head, to make it so that the neck doesn’t go in as deeply. I lengthen most necks by hot glue sueding, because it requires no specialized equipment, and you can choose how thick it is, and it just scrapes off once you decide you’d like the head on a different body, or you’d like more or less cushion there.

if you’re looking for a significant amount of length (like more length than the head-hope is deep) you’d have to do an additive mod on the top of the neck joint, where you’d put apoxie or milliput on the top of the neck, and then let it cure and match it to have a longer neck. You could also sculpt a bigger, taller neck doughnut that is removable, if you put some Saran Wrap in between the neck and the apoxie, but it would probably look somewhat like the extra neck joints in Doll Chateau dolls look, and would give a bit of an inhuman vibe to the doll you’re modding.

 

I'm not sure if you are talking about modding a neck to make it longer or if you are talking about a separate neck piece to add between the neck and the head, or asking for someone who can do the mod for you, but more or less I agree with Chameleon for what your options are.

A separate piece may be a good start to help you figure out how tall you want the neck to be, but if you want a long term solution, then a permanent mod is probably the way to go.

Here is a link to a sticky about additive modding materials, if you want to make a piece or do the mod yourself.
You can also do a few searches for similar projects people have done before to get and idea of how it's usually done.
If you decide to go for it, a project journal is a good way to get feedback and tips along the way as well as a good place for the rest of us to cheer you on.

If you are looking for someone to do the mod for you, you'll have to wait until you have market place access and find someone to commission though there.

 

Low temp hot glue (the cheap craft store glue gun type) is safe for resin and will just peel off when cooled if something goes wrong. It can also be used to line joints for better posing - there's a lot on the forum about it if you search for "hot glue sueding".

I've used hot glue to fill a bigger neck hole so the head could sit higher on a thinner neck and it worked great. I had problems with kips/silicone disks slipping out of position but glue stays put well plus it took just 5 minutes to try it out. The mobility was also good, you have control over where to put more or less glue to make things fit to your liking.

 

Hot glue from a regular craft store low-temp hot glue gun is nowhere near hot enough to damage resin. I dye dolls in boiling water, and that makes the resin a tad more supple, a tad more pliable (you can slightly re-pose fingers), but does not do damage to the resin—it takes heat decently well!! The hot glue increases friction, and doesn’t impede mobility as long as you don’t put too much along the sides of the neck socket, so it’ll make the head stay in position better than resin-on-resin because there’s more friction.

to remove it, like cobalt conductors said, you just peel it off, you can just pry it off with your nails—it won’t stick too much to be permanent.