Hello. I would greatly appreciate advice for making moulds for picture frames. As you see in the photo attached to this post, I have a master that is made of acrylic. There are four parallel sides and a top lip that is perpendicular to the sides. I was thinking about casting it so that the top of the lip is exposed. this way i only need a one part mould. Gravity will level whatever material is poured into the mould to create a flat surface. But perhaps there are problems with this method that I am not aware of?
I want to make frames of various sizes cast out of various materials, such as epoxy, silicone, rubber, plaster, if possible. I would like to create a nice set of moulds for about half a dozen sizes that i can reuse for a long time, if possible.
So, far, I have purchased some epoxy in styrene at my local boat store. I am ready to try this material but I am nervous to try it and just waste my time and effort. I am interested in buying materials from easy composites if it means i will get better results. I await your advice. Thanks.
Size of acrylic "pattern" picture frame in photo attached here is 13x18cm. I want to make moulds and casts for picture frames all the way up to 100cm.