Blanket molds are a popular technique for creating molds of various models. As the name implies, a coating of mold making material is laid down over the model, akin to a blanket! This includes varied methods of applying the mold material, such as pouring, brushing, and spraying
Let's take a look at some of the methods:
Poured - The process begins with securing the model on a flat and smooth mounting board. The model can be encased in plastic wrap to keep it safe from the mold making material. Then long strips of clay are rolled before laying them directly on the model. Press the clay carefully in the undercuts so that it stays uniform even while capturing the shape and undercuts properly without thinning out or tearing. The layer should also extend beyond the model to form a flange. A spue (pouring hole) and vents are made on the mold prior to making a shell mold of plaster with appropriate legs. After proper curing, the mold is demolded from the board by using a knife.
The clay mold is removed and the shell mold is placed back over the model. The casting material can be easily poured into the mold and will be quite easy to demold as well.
Sprayed or brushed - These are simpler methods of making blanket molds and will be especially suitable for beginners. The model is secured on the base and the mold making material is simply brushed or sprayed all over the entire surface uniformly. A shell mold is required as well to provide a ridged backing.
Glove mold - The model is secured on a base and the mold making material (usually liquid latex or silicone rubber) is painted on until it forms a thick enough surface. A flange should be created as well. Once cured, the mold is turned back on itself and peeled off the model literally like a glove or sock. Alternatively, a more complicated glove mold can also be partly slit on one side to make it easier to remove. This reduces the chances of tearing and gives the mold a longer life. It is known as cut glove mold.
While blanket molds usually do not capture the back of the model, it is possible to make two-piece or complex molds in multiple sections when the entire model needs to be covered.
The making of a blanket molds take less time and needs less experience than the more complex block or multi-part molds. The benefit of a blanket molds is that it uses significantly less mold making material than a standard block mold.
Whichever technique you use to make molds and subsequent casts, do finish off your creations with an appropriate mount and brass name plate. A brass name plate custom engraved with the title of the piece, the date created and the name of the artist will instantly lift the art work above and beyond the ordinary by giving it a professional and gallery-like finish!
