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Two part and 3D molds require that multiple molds be made, one at a time, over sections of an object. In order to accomplish this task, portions of an object are buried in a clay bed made from Safe-D-Clay. This tutorial covers the process by providing pictorial, step by step instruction that demystifies this common mold making practice.

Click the pictures below to enlarge.

Step 1


Step 2

A parting line represents where on a model the two halves of the mold will separate and come together. The parting line in this example runs directly down the middle of our model and a marker is used to visually identify its position. Remember that the parting line should be placed in such a manner that each half of the mold can be removed without exerting a destructive influence on the object being unmolded and the mold avoids entrapment by an undercut.


Apply a light yet thorough coat of Release-Dit™ to the side of the model that will be imbedded in clay. The Release-Dit™ acts as a parting agent so that the clay can be more easily removed when it comes time to make the second side of the two part mold.

Step 3


Step 4

Place model on a pad of Safe-D-Clay™ so that the Release-Dit™ covered side is facing down and the other side as defined by the parting line is level and facing up. Use a Chef’s Level to make sure the model is level.


Every pound of Safe-D-Clay™ comes is four rectangular segments. Cut down the length of the Safe-D-Clay™ segment aligning the knife so that a diagonal cut (corner to corner) is made in order to produce two clay wedges. Place the wedges as shown in photo in order to stabilize the model and keep it in place as the clay bed is being constructed.

Step 5


Step 6

Using more Safe-D-Clay™ segments, cut a place Safe-D-Clay™ in order to create a flange around the model at least 1 inch wide. Important: Safe-D-Clay™should be stacked so that it is exactly even with the parting line.


Once the Safe-D-Clay™ has been stacked and puzzle-pieced together to form the general shape and proportions of the clay bed, rub out the seams in order to create a smooth surfaced bed of clay surrounding the model. This can be done by hand or by using clay working tools. Important: The clay bed should be pressed and smoothed against the model at the parting line. There should be no air gaps of any kind between the model and the clay bed where the clay flange and the model meet.


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