About Applying Shrinkage
You must consider the shrinkage of the material and proportionally increase dimensions of the reference model before you start molding the reference model. You can apply shrinkage to the reference model in Mold (Cast) mode and depending on the method of applying shrinkage, it may propagate to the design model. You can also apply shrinkage to the design model or reference model in Part mode.
The two methods of applying shrinkage are:
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Shrink by dimension—Allows you to set up one shrink coefficient for all model dimensions, and specify shrink coefficients for individual dimensions. You can choose to apply shrinkage to the design model.
Shrink by dimension—Allows you to set up one shrink coefficient for all model dimensions, and specify shrink coefficients for individual dimensions. You can choose to apply shrinkage to the design model.• 
Shrink by scale—Allows you to shrink the part geometry by scaling it with respect to a coordinate system. You can specify different shrinkage ratio for the X-, Y-, and Z-coordinates. If you apply shrinkage in Mold (Cast) mode, it applies only to the reference model and does not affect the design model.
Shrink by scale—Allows you to shrink the part geometry by scaling it with respect to a coordinate system. You can specify different shrinkage ratio for the X-, Y-, and Z-coordinates. If you apply shrinkage in Mold (Cast) mode, it applies only to the reference model and does not affect the design model.Two formulae are used to calculate shrinkage. The formula 1/(1–S) allows you to specify a shrinkage factor that is based upon the final geometry of the reference part once shrinkage is applied. The formula 1+S uses a pre-calculated shrinkage factor that is based upon the original geometry of the part.
To view information on shrinkage applied to the part, click > > 
Shrinkage Information or click > > Shrinkage Information.
Shrinkage Information or click > > Shrinkage Information.