Casting with resins has created a whole new set of surface problems. Besides burnout problems, resin is porous and needs to be coated with something to ensure and smooth casting. Jewelers are using plastic spray paint and even mineral oil to accomplish this. Here at TIJT one of our students decided to try hair spray…and it worked perfectly! It seemed to be smoother than the paint (which can run if used to heavily) and did not attract nodules like the mineral oil.
Just spray the resin with hair spray about 30 minutes before investing. We are casting with the PIC 100, a much simpler resin than the EC 500 to work with because it does not require a separate investment. Invest with satin cast and adjust the burnout for the expansion of the resin for a perfect casting. The first picture shows a resin model from our growing machine that has been coated with hair spray. The second picture shows the same model after casting.
The Texas Institute of Jewelry Technology offers training in computer aided design and computer aided manufacturing that introduces the latest technology. Students learn to design virtual jewelry and then send it to a multiple axis milling system or 3D printer to provide the perfect model for casting. For more information visit our website: www.parisjc.edu/tijt
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parisjc
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