Fornax Posted September 9, 2020 Report Share Posted September 9, 2020 ı have a simple press and a mold for porcelain handle. Unfortunately, the clay which ı prepared doesnt work well . when ı put the clay into mold and press it the last product comes with little fractures. To prepare the clay ım using oil for it and using a mixing machine. ı need an appropriate recipe for clay. if you have other ideas to make it better please enligthen me . Link to comment Share on other sites More sharing options...
Fornax Posted September 9, 2020 Author Report Share Posted September 9, 2020 additionaly the clay is not enough bright and smooth Link to comment Share on other sites More sharing options...
Sorcery Posted September 9, 2020 Report Share Posted September 9, 2020 Oil? It may just need to age longer, it sounds short. What is the current recipe? Sorce Link to comment Share on other sites More sharing options...
Fornax Posted September 9, 2020 Author Report Share Posted September 9, 2020 For 25 kg dry content ım using 4 litres water and 2 litres oil. If you have e mail I can send you some pictures of it and I mix the content for an hour Link to comment Share on other sites More sharing options...
Callie Beller Diesel Posted September 9, 2020 Report Share Posted September 9, 2020 Hi and welcome to the forum! To help you, I think we need more information. Why are you putting oil in a pottery clay? I know oil gets used in plasticine or in clays used to make mould masters for special effects industry or other industrial design applications, but it’s not typically used in dinnerware production. Link to comment Share on other sites More sharing options...
Fornax Posted September 9, 2020 Author Report Share Posted September 9, 2020 First of all thank you for your concern. I don't know exactly why or which kind of oil used and like you said I purpose for industrial production. I learned this recipe from people whom doin this job but they don't give exact details so I used different ratios of oil and water. The last recipe I wrote is close being better. What givrs nuisance for me is nothing than when I put the clay into mold and press the button to shape it its okay. But when the process completed and I saw the product it has defects like cracks on the surface its not smooth. But it should be like that. Also I doubt about pressure and velocity of press Link to comment Share on other sites More sharing options...
Fornax Posted September 9, 2020 Author Report Share Posted September 9, 2020 So how I can I can make it like smooth like silk Link to comment Share on other sites More sharing options...
Fornax Posted September 9, 2020 Author Report Share Posted September 9, 2020 I can send you pictures of the defects if you have a proper way for me to send it to you Link to comment Share on other sites More sharing options...
Stephen Posted September 11, 2020 Report Share Posted September 11, 2020 I also question adding oil to porcelain, i'd double check that. Link to comment Share on other sites More sharing options...
PeterH Posted September 12, 2020 Report Share Posted September 12, 2020 You might find some information in the thread Oil based "plasticine" clay recipe Link to comment Share on other sites More sharing options...
neilestrick Posted September 13, 2020 Report Share Posted September 13, 2020 I think the oil is the problem, especially if you also have water in the clay. As we know, water and oil don't mix. I've had to do some stamping on clay, and vegetable oil on the surface was the best way to get the stamp from sticking due to very small details in the stamp. If I used too much oil the clay would crack in odd ways. With a decent porcelain, you shouldn't have any trouble getting a smooth surface from a press mold. The other issue, assuming you're using a plaster mold, is that the oil is going to ruin the porosity of the mold and make it much more difficult to get the clay out of the mold. Give you mold a good cleaning with soap and water to get the oil out. Link to comment Share on other sites More sharing options...
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