Showing posts with label Two part molds. Show all posts
Showing posts with label Two part molds. Show all posts

Range of Silicone Mold Rubbers

The leading art supplier, EnvironMolds provides a variety of silicone mold rubbers to suit any kind of mold making activity. This two-part RTV material has emerged as the best choice for various mold types. And there are different varieties to suit different applications, such as:

  • MoldRite 25 – This is a very popular variety as it is suitable for most general silicone mold making. It will create traditional silicone molds for figurines, giftware prototype tooling and stereolithography. It has a good shelf life, pot life of 2 hours, 40 minute working time and requires about 6 hours curing before it can be demolded. 

  • 5-Minute Mold Putty – This is your choice of silicone rubber for making molds very quickly and easily. You can make good impressions within just 5 minutes even without a mold box. The silicone mold can be cast immediately. It is suitable for food grade applications too.

  • SkinRite 10 – This is a soft and translucent silicone rubber that can be used for special effects or to simulate real skin surfaces. All it requires is a little tinting. It is apt for making realistic masks and doll reborning

  • LifeRite – If you are looking for a skin safe silicone rubber for making life casts and duplicating body parts, LifeRite is the perfect answer. The body molds will be reusable too. 

  •  BakeSil – This food safe silicone is FDA approved and can be easily used to make food molds and baking containers.

Perfect the art of making one part and two part molds to enjoy making silicone molds of almost anything!

Of One-Part, Two-Part Molds and More


As an art teacher, I am often faced with confused students who just don’t know when to make single part molds and when two or more part molds are required.
Let me clarify this uncertainty for everyone out there as well.
A one-part mold is basically a simple mold. It is used for making molds of figurines, small statues and other uncomplicated objects. Needless to say, this kind of mold is easy to make. All you have to do is fix the model to a mold box and pour or apply the mold making material all over and around it.
As the model has to be glued down in the mold box, it goes without saying that it should have at least one flat surface. It should be entirely level without any undercuts or any kind.
It follows that a shapely model with uneven surfaces and deep undercuts needs to be reproduced in parts. What it needs is a two-part or even a multi-part mold to capture all the details on all the sides. This is a complex technique that requires a lot of care and practice to master the various requirements. Parting lines, mold keys and spues also come into play here.
In sum, two part molds become requisite when a model has to be reproduced in its entirety on all sides on account of the undercuts and other details everywhere.

Making a Two Part Mold

As a fledgling casting artist, I have become quite adept at capturing the form of simple objects in negative molds. All I have to do is secure the model in a box before pouring or applying the mold making material of my choice. I am adroitly able to capture the intricate undercuts and angles with clay, alginate and even resins.

Now I am just itching to move on and try my hand at making molds of more complicated objects. I picked a shapely figurine for this task and was well aware that the level of detailing all around the model required me to make two part molds.

In simple words, this means that I cannot make the mold in one go. What I need is two molds with each part capturing one half of the model before merging them into a single composite mold.

I chose plaster for this job and started by making a parting line all around the figurine. I followed an ArtMolds video that showed me how to portion off below the parting line with clay and make keys on the clay perimeter. Making a mold of the remaining half was quite easy.

Once cured, I carefully removed the clay border before making a similar mold of the other side. The video guided me on exactly how to join the two parts of the mold together and strap it securely for the subsequent casting.

The mold turned out a little shaky but I was still elated with my first attempt at two part molds!