Testing silicone adherence and softness for repairs
Testing silicone adherence and softness for repairs
Now the complication with using only psycho paint and ecoflex is the shore hardness of the resulting mixture. When I first started looking to repair silicone (viewtopic.php?p=2431091#p2431091) I purchased some sil-poxy and later a no-name silicone doll adhesive and finally some psycho paint + pigment, but all of these result in repairs that are much harder than the doll's silicone. Psycho paint is about A-30, sil-poxy is much harder, maybe A-40, while the no-name adhesive is maybe A-25. I liked the no-name adhesive the best and found repairs using it will last several months, but since it's still much harder than the underlying silicone it's not a perfect solution. I estimate the softer parts of this particular doll to have a shore hardness = OO-10 and the only way to achieve that softness is to introduce another product called "slacker" into the mix. This makes the silicone soft but also makes it sticky, and the more slacker the softer and stickier it becomes. Smooth-On recommends adding no more than 50% slacker and I found the resulting silicone is like the inside of a cooked marshmellow: extremely sticky and so soft you can barely feel it. It also will not return to its original shape. At 35% slacker and 65% ecoflex the cured mixture is still extremely sticky but it can be stuck and unstuck from itself and returns to its original shape easily. I feel like this ratio is close to the softness of a soft TPE like those used in fleshlights (so it's softer than a typical TPE doll).
To make a particular hardness of silicone you simply need to place your softer and harder mixtures on the same scale, e.g. psycho paint is about OO-72 on the OO scale and the ecoflex is OO-20. If we mix 50% psycho paint and 50% ecoflex, the resulting mixture will cure to a hardness of about OO-46 ((20 + 72) / 2). Using ratios allow you to create a mixture of any hardness between the two you are working with, and I found it helpful to create samples of several different ratios to have as a reference. After doing all these tests I think the following approach would be good for performing large repairs. First coat the raw, torn surfaces with an extremely thin layer of 30% psycho paint + 30% slacker + 40% ecoflex OO-20 to create a surface of fresh silicone that can be easily bonded to. This is the softest mixture I found that holds permanently and is strong, but it may be harder than a soft silicone used in a doll, so make it as thin as possible. Then mix ecoflex with slacker to create the softness that matches your doll's silicone, e.g. 30% slacker and 70% ecoflex OO-20, and use it to fill in the larger missing areas for the repair. After it cures the resulting soft silicone will be sticky and you can coat it with a thin layer of ecoflex to remove the stickiness.
In the end I decided to create a vaginal insert for my doll rather than performing another repair and will make a new topic about this project. Good luck out there with your own repairs.
-
- Doll Mentor
- Posts: 1609
- Joined: Thu Jul 23, 2015 8:14 pm
- Contact:
Re: Testing silicone adherence and softness for repairs
Re: Testing silicone adherence and softness for repairs
Reverend Jack
ALSO TRY Reverend Jack's Anointed Snake Oil, good for cleansing stains from the body and the Soul! Step right up folks, only $5 a bottle! We got plenty to go around! Cash only please.
Aibei 158 Blue Elf, AS 157, XES 128, OR 156G, WM 160C (r), Sanhui 168 (r), WM 157B, WM 138D (Faun), Mistress 168 (r), 6YE 100 (Bubbles)
-
- Senior Member
- Posts: 366
- Joined: Mon May 29, 2023 8:12 pm
- Contact: