GonefishingAZ Posted March 15, 2009 Report Share Posted March 15, 2009 I tried using some wax around the bottom of my master that was glued in place as VODKAMAN suggested. Couldn Quote Link to comment Share on other sites More sharing options...
Vodkaman Posted March 15, 2009 Report Share Posted March 15, 2009 I think we may be chasing a lost cause here. Unless the mold can be pulled off straight, without catching the bait, the plaster will always chip. Your master is still slightly die locked. It could also be that you are not letting the plaster harden enough. There was a discussion a long time ago, about how soon you should remove your masters (sorry, I could not find the link). From what I remember, the experienced PoPpers, let the plaster dry before removing, anyone have comments on this?. Maybe it is time to cut your losses and take Nova's advice and make new masters, only do not bake, use while still soft. This way, the masters can be removed without hurting the delicate PoP mold. This time, learn from your experience of the plaster wrapping around the master and shape the master accordingly. You can still apply a fillet of wax as extra insurance. A basic rule of molding is hard casting (the master in this case) / soft mold, soft master / hard mold (PoP). Basically you have broken this rule and ended up with a die locked condition. Dave Quote Link to comment Share on other sites More sharing options...
GonefishingAZ Posted March 15, 2009 Author Report Share Posted March 15, 2009 I waited 12 hours to remove this mold. I will not be baking Sculpey anymore when making one piece molds. Oh well, It was worth trying. At least is was a very simple design. Quote Link to comment Share on other sites More sharing options...
Vodkaman Posted March 15, 2009 Report Share Posted March 15, 2009 12 hours only represents roughly about 10% dry, so the plaster is still very soft. A mold of that size would take at least a week to fully dry at room temperature, maybe longer. You have not wasted any time, consider this all learning and experience. Dave Quote Link to comment Share on other sites More sharing options...
Pitbull Baits Posted March 15, 2009 Report Share Posted March 15, 2009 I let them dry for 45 min then take them out. Basicly after they cool down. If you leave your master in to long they Can shrink or get hard. I use the double sided tape to hold them down. Then I use a file or something straight to clean the edges up. When you use POP to make molds they never will come out perfect. When you seal them it will cover some of the cracks or dimples up. Quote Link to comment Share on other sites More sharing options...
nova Posted March 15, 2009 Report Share Posted March 15, 2009 A little trick I just found is to fill any bubble holes in the POP with JB Weld. I just did a mold the other day and it had a couple of bubble depressions in it.(one was quite large) I grabbed the JB Weld and mixed a little up, filled the holes and let it set up. Then I proceeded to epoxy the POP in my normal way. Mold came out perfect. Just thought this might help. www.novalures.com Quote Link to comment Share on other sites More sharing options...
GonefishingAZ Posted March 16, 2009 Author Report Share Posted March 16, 2009 Ok, I added more wax and repoured it. I also made a couple new designs with Sculpey and I didn't bake them this time. I'm going to let them sit over night and see how they turn out after work tomorrow. Quote Link to comment Share on other sites More sharing options...
Romeo D Posted March 16, 2009 Report Share Posted March 16, 2009 Gonefishing... You can probably save that mold with the long chip. Place your waxed master in and mix up a little pop with water and glue-all and fill in that little section. Once dry remove master and use a fine sand paper to smooth out that edge. Patch it and pour some plastic in it then you will have a Soft master to work with for multi cavity molds. What Vodkaman said in his earlier post, easiest to use a soft master with a hard mold or a hard master with a soft(rtv type) mold. One will give a little when separated. Quote Link to comment Share on other sites More sharing options...
