Mirco-Mark Resin Casting Kit?
Posted 02 March 2012 - 11:35 PM
Posted 03 March 2012 - 03:07 AM
I would start this way..
Smooth-on makes many silicones and resins with many set up times in "trial kit" packaging, the same size items found in the starter sets, its just you are picking what would be a better experience.
Smooth-on smoothcast 305 for white parts, or 321 for tan parts these resins are the same just a different color, it has a 7 minute mixing time and a 30-1hour demold time, it is much easier to use than the faster stuff as it allows you knock out air bubbles or pick them away.
Silicones, this is where I would use a 10:1 mix silicone, you will need to weigh it with a gram scale, but its really easy..it sounds more complicated than it really is.
Smooth-on mold max 20 would be a great way to go, you get about 45 minutes of actual mixing time with it, allowing you to pour thin streams to get the least amount of bubbles in your mold.
Now you can try the smooth-on mold start silicone which is 1:1 mix and very durable, but platinum based silicones dont play nice with some masters, so i would hold off on it till you get your feet wet.
Some folks may suggest the Oomoo 1:1 silicone but that stuff is not durable at all, you can tear it with your hand, its only good for a handful of castings ..a bit more if you baby it.
Posted 03 March 2012 - 07:13 AM
If you can post of show us what you're planning to cast, we can help you chose both mold rubber and casting resin which would be best for your needs.
Posted 03 March 2012 - 08:49 PM
Posted 06 March 2012 - 11:31 PM
Edited by kevjoh, 06 March 2012 - 11:32 PM.
Posted 07 March 2012 - 12:56 AM
Posted 08 March 2012 - 05:08 AM
I have used Alumilite white for about 2 years now w/out any issues, although it doesn't give you much working time which some people do not like (I dont mind). I'm going to try some of Smooth On's products next to experiment, perhaps something that allows a bit more working time. I also have a sample of Mold Star 15 Platinum from Smooth On at home that I plan on trying this week. Heard good things about it. Its 1:1 mix ratio so a measuring scale is not necessary. If you can get your hands on it, I'd suggest getting the Alumilite DVD. Its pretty informative and will give you the basic understanding of resin casting, mold making, materials being used, etc.
Edited by shucky, 08 March 2012 - 05:14 AM.
Posted 23 March 2012 - 10:07 AM
MM's silicone is made by Smooth-On but with a twist. Smooth-On sells two versions of their Oomoo resin called Oomoo 25 and Oomoo 30. The 25 sets faster but is on the soft side so it's not as durable and parts might sometimes get distorted before they set if you're not careful. I use the 30. It takes a several hours to set but produces a good firm mold. Now for the twist - MM only sells one type of silicone and it's kind of like an Oomoo 27.5 if you get my drift. It's between the 25 and 30 in both hardness and cure time. I think it kind of hits a sweetspot that's just right but once again it costs a little more than Smooth-On and I can live with a longer cure time so I get Oomoo 30. Your choice.
Edited by mr moto, 23 March 2012 - 10:14 AM.