Plaster mold casting is such a tedious task to do. It is a kind of artwork process that is quite the same as how sand casting is done. The main difference between plaster mold casting is the materials we use in the process. It doesn’t use sand but plaster of paris.
Although this task is quite dull, it still feels rewarding to make one of your own. Here we will show you how to make your very own plaster mold.
Step by step guide for making a plaster mold
1. You will need to find an appropriate workspace to do this task. Clear up any obstructions in the space and keep it free to set-up all your tools and other materials.
2. Grab a partner or get some help with an expert to help you do the task successfully. Once you feel comfortable doing this on your own, you may invite family and friends to join you for an arts and crafts session.
3. You will need to prepare the following materials down below:
- A figure of your choice (this can be any figure, an animal, a notable person, superhero or figurines)
- Some clay for molding
- A few rubber bands
- A good amount of plaster of paris
- A balloon latex
- Petroleum jelly or lip balm
- A brush
- Set of Gloves and apron
4. To get you started, you will need to grab your molding clay and chosen figure. Press the figure onto the clay until the figure copies its actual form to the clay. Press it until you reach half of the clay and take it out. This shall serve as the other half of your mold.
5. Check the clay and the actual figurine. You will need to see if the clay got all the features from the figure since this one will be used to create the mold later.
6. Then you will need to set aside the clay and the figurine and proceed with making the box for the mold. Build a mold box that can fit the figure of your choice. You will still use the clay to build the box and check if the figure can fit in the box.
7. Then get your brush and get some of that petroleum jelly or lip balm and apply it onto the figure that will be placed into the mold. The petroleum jelly or lip balm will help the figure to not stick from the plaster and have a successful mold. If you don’t have any of these two, anybody lotion can do the job.
8. Once your molding box is ready, start mixing your plaster of paris and strictly follow the directions as stated in the packet. Make sure there are no bubbles on the mixture and achieve the right consistency that you need to create the plaster.
9. After mixing the plaster, slowly pour the plaster mixture onto the molding box covering the whole area. Make sure you’ve filled up the molded clay from bottom to top to achieve the original shape of the figure.
10. After pouring the plaster, you will need to let the plaster mold to dry. You will need to be patient on this one and make sure you store the mold in a safe place. Depending on how big or small your figure is, it will take a good amount to dry. If you take the figure out too early, the mold will be too wet and deform. So it’s best to wait.
11. You can check the plaster if it’s dry. Once you’re sure that it is, you can already start taking away the box and the figure. Remove it carefully without breaking the mold, or you will repeat from step 1.
12. You will need to start working on the other half of the figurine. Just follow the previous steps from step 4-11. The only difference is that you will be molding the back part of the figure. Make sure you double-check if you did the front or back for the first mold.
13. While the other half of your mold is drying, grab the first mold that you’ve done and reapply some petroleum jelly or lip balm to it. Make sure you’ve coated every part of the mold and not miss any single area.
14. Check if the other half of the mold has dried up good and start taking it out.
15. Then, you will need to connect both of the moldings to form the original figure. Grab some rubber bands and tie both of the moldings together. Ensure that both moldings are well leveled and secured.
16. Grab your balloon latex and open the bottle. Get one to two tablespoons of latex and pour it to the mold of the figure. Shake the latex around the mold to make sure that the coat is even.
17. Then pour the remaining latex out. Make sure you didn’t overfill some balloon latex, or it will come out too thick. After you pour out the balloon latex, let the mold dry.
Again, depending on how big or small your mold is, it can take a bit longer to dry completely. For a safe side, let it dry for at least overnight without touching the mold to avoid any of your finger marks on it. Make sure that the mold is drying away from the reach of kids or pets. At this time, the drying is crucial, and any mistakes can break the mold.
Once it’s dried up, you’re ready to display your very own plaster mold figure. Feel free to color it or have it as it is. Make sure that when you color it, you also dry it properly to prevent it from smearing.
Can you make a mold out of plaster?
Can you make your own molds?
How do you make a mold out of household items?
- Buy 100% silicone caulking.
- Squeeze it out into a bowl.
- Mix 5 tablespoons of cornstarch into the silicone.
- Wipe our original shape with a mold release, such as vegetable oil or vaseline.
- Pour the silicone over the object you want to mold.
- Let cure.
How do you make a large mold?
What is the best material for making a mold?
How do you smooth out silicone molds?
Can I use WD40 as a mold release?
Does Vaseline work as a mold release?
What can I use for silicone mold release?
Can I use car wax as a mold release?
For amateur builders, automotive paste wax made with carnauba wax can often be substituted for mold release wax. Meguiar’s Mirror Glaze Automotive Paste Wax is one brand that has worked well for us. Avoid liquid car waxes, as they are not as effective and can cause release problems.
What material does silicone not stick to?
How do you keep silicone molds from sticking?
Why is my resin not coming out of the mold?
Do you need to grease silicone molds?
Why is my resin stuck in the mold?
While resin generates heat when mixed with hardener, too much heat can melt the mold, causing the resin to stick.