interesting mold shrinking technique

[Lownslow]

http://scihighmodels.com/howto_shrink.html

[Mike Kucaba]

Old news,but good to know about. There is also some products out there like Hydro-span that does similar effects.

[Lownslow]

Old news,but good to know about. There is also some products out there like Hydro-span that does similar effects.

i just poured one on a speaker well see how it turns out cause theres some tires i wanna shrink down

[charlie8575]

I've never heard of this before. Good thing to know.

Charlie Larkin

[kevin]

i also enjoyed it!

[Casey]

Someone posted this a few years ago, as I recall thinking I would try it, but never did. The months-long waiting period for the mold to cure was a bit of a deterrent for me.

[my66s55]

Smooth-On shows you what to use and how to do this right on there web site: http://www.smooth-on.com/faq_display.php?faq_id=79&cID=2

[Lownslow]

worked great

[my66s55]

Fantastic. Good to know Frank.

[Repstock]

Anyone want to try this with the 1/20 Econoline kit?

[Lownslow]

i should reword that the current wheel was actually upscaled by soaking the mold in naphta ive yet to shrink a mold

[Casey]

What percentage did the wheel increase by?

[Lownslow]

What percentage did the wheel increase by?

not sure it went from 13" to 21"

[Casey]

How long did it soak (totally covered/submerged) in acetone?

Shrinking doesn't have much use to me, but enlarging molds would be very handy.

[Lownslow]

How long did it soak (totally covered/submerged) in acetone?

Shrinking doesn't have much use to me, but enlarging molds would be very handy.

naphta not acetone a few hours youll notice once the mold has fully grown. only mold max shrinks back to its original size

[Casey]

Sorry, naptha. I will definitely be trying this. Let us know if the mold life is shortened or otherwise affected by the naptha.

How long had the mold cured before you enlarged it with the naptha?

[Lownslow]

Sorry, naptha. I will definitely be trying this. Let us know if the mold life is shortened or otherwise affected by the naptha.

How long had the mold cured before you enlarged it with the naptha?

didnt want you desintergrading a mold either lol, the stuff i use is mold max it has yet to cause a negative effect even after reverting to its old size. oomoo30 stayed enlarged and the mold became brittle after 2 castings. dont know how other compounds react as i dont have them on hand ive yet to try a 2 piece mold

[Casey]

I have plenty of molds to try it on, so no worries there. I suppose once a new, enlarged master is created, the mold it came from will no longer be needed anyway.

[epi4561]

didnt want you desintergrading a mold either lol, the stuff i use is mold max it has yet to cause a negative effect even after reverting to its old size. oomoo30 stayed enlarged and the mold became brittle after 2 castings. dont know how other compounds react as i dont have them on hand ive yet to try a 2 piece mold

So, you're saying that mold max will expand when soaked in naptha and will contract back to its original size without compromising the original mold? How long before the mold started contracting again?

thanks-epi

[Lownslow]

So, you're saying that mold max will expand when soaked in naptha and will contract back to its original size without compromising the original mold? How long before the mold started contracting again?

thanks-epi

immediately after so you have a small window to cast parts