Mitzuuu89 7 Posted July 2, 2019 Report Share Posted July 2, 2019 Hi, Anyone experienced similar defects when slip casting? Any solutions? Create a extra paster ring and cut after? Thanks! Quote Link to post Share on other sites
Mark C. 4,716 Posted July 2, 2019 Report Share Posted July 2, 2019 your photo does not show any defects?? Quote Link to post Share on other sites
Mitzuuu89 7 Posted July 2, 2019 Author Report Share Posted July 2, 2019 3 hours ago, Mark C. said: your photo does not show any defects?? There’s a ridge formed at the rim Quote Link to post Share on other sites
liambesaw 2,612 Posted July 2, 2019 Report Share Posted July 2, 2019 Looks like a feature to me! Nice and smooth on the lips, a little extra clay there for some strength. But yeah, could probably cut it off if you don't like it. Quote Link to post Share on other sites
Mark C. 4,716 Posted July 2, 2019 Report Share Posted July 2, 2019 Is the lip the top of mold and you cut it off in mold ?or can you tell us more about the mold details? uneveness is where layers of slip build up as slip dries and level drops in molds usually one has so room in spout for this to happen and be cut off- Quote Link to post Share on other sites
Mitzuuu89 7 Posted July 2, 2019 Author Report Share Posted July 2, 2019 9 minutes ago, Mark C. said: Is the lip the top of mold and you cut it off in mold ?or can you tell us more about the mold details? uneveness is where layers of slip build up as slip dries and level drops in molds usually one has so room in spout for this to happen and be cut off- My mold is exactly the size of the object, so no extra room to cut it off hm ok.. i’ve tried to be careful to make sure the mold is always topped with slip, but the top layer dries as well, so that might be the reason as you mentioned. Quote Link to post Share on other sites
Mark C. 4,716 Posted July 2, 2019 Report Share Posted July 2, 2019 Molds will suck up slip as they dry and if yours in the exact size there is NO room for this to happen-Thats whats going on.Molds need a spout or a space for slip level to drop and then you add more slip as the time goes by as the walls thicken. You must includ this space in your mold. Hopefully you understand what I'm saying. Your uneven rim is becuase slip is drying and the level drops you add some but its already dried so thats your issue . Quote Link to post Share on other sites
Mitzuuu89 7 Posted July 3, 2019 Author Report Share Posted July 3, 2019 9 hours ago, Mark C. said: Molds will suck up slip as they dry and if yours in the exact size there is NO room for this to happen-Thats whats going on.Molds need a spout or a space for slip level to drop and then you add more slip as the time goes by as the walls thicken. You must includ this space in your mold. Hopefully you understand what I'm saying. Your uneven rim is becuase slip is drying and the level drops you add some but its already dried so thats your issue . thanks for addresing my issue! i'll try to include some space in my next molds, and see what happens Quote Link to post Share on other sites
Chilly 877 Posted July 4, 2019 Report Share Posted July 4, 2019 On 7/3/2019 at 8:34 AM, Mitzuuu89 said: thanks for addresing my issue! i'll try to include some space in my next molds, and see what happens You need a funnel built in to your mould, also called a sprue. It is shaped so you can run a flat plastic blade around it, to remove the excess thick/thin build up. I'll go take a photo later so you can see what I mean. Mitzuuu89 1 Quote Link to post Share on other sites
Mitzuuu89 7 Posted July 4, 2019 Author Report Share Posted July 4, 2019 53 minutes ago, Chilly said: You need a funnel built in to your mould, also called a sprue. It is shaped so you can run a flat plastic blade around it, to remove the excess thick/thin build up. I'll go take a photo later so you can see what I mean. great! thanks Quote Link to post Share on other sites
Chilly 877 Posted July 4, 2019 Report Share Posted July 4, 2019 Let me know if there's anything you don't understand. The tool is called a Lucy Tool. The fat end is good for prising moulds apart, the thin end for removing the sprue waste. Quote Link to post Share on other sites
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