Module 2
Dart Manipulation
A dart is a wedge-shaped fold of fabric that transforms a flat, two-dimensional piece of material into a three-dimensional shape. Learning how to move and transform darts makes it possible to control where shaping occurs and how it performs in a design. Dart manipulation is often used to make crucial fit adjustments to a block, such as a small/full bust adjustment, redistribution of gaping or excess material, or as a way to change the length or width of a pattern piece without altering its shape. Darts can also be used to absorb excess ease or can be released into ease to achieve specific design goals. Therefore, the process of dart manipulation—particularly rotating and reshaping darts using the “slash and spread” method—is a crucial skill to understand before drafting your basic pattern set.
Concepts such as dart equivalence, dart rotation, dart splitting, and dart absorption describe how the same amount of shaping can be redistributed throughout a pattern. The following exercises introduce these principles and demonstrate how darts can be moved and transformed without altering the way a garment fits. As you work through them, you should develop confidence moving darts using the slash and spread and pivotal transfer methods. Most of this work is best completed on paper at half-scale. Feel free to use the example bodice pattern provided at the end of this module, or you can print a half-scale version of a darted bodice from an existing commercial pattern (note that this works best if the bust apex is already clearly marked).
Readings
Exercises:
- Half-scale paper exercise: Slash and spread (Pages 87–89)
- Center waist dart
- Mid-shoulder dart
- Center-front neck dart
- French dart
- Half-scale paper exercise: Pivotal transfer (Pages 90–94)
- Mid-neck dart
- Side dart
- Mid-armhole dart
- Shoulder tip dart
- Half-scale paper exercise: Two dart series, slash and spread (Pages 100–103)
- Waist and side darts
- Mid-shoulder and waist darts
- Mid-armhole and waist darts
- Half-scale paper exercise: Two dart series, pivotal transfer (Pages 104–106)
- Mid-neck and waist darts
- Shoulder-tip and waist darts
- Center-front neck and waist darts
- Paper exercise: Practice drafting a back bodice block without a shoulder dart by 1) redistributing the dart as ease to the neckline, shoulder, and armscye, 2) rotating the dart to the neckline or waist, or 3) redistributing the dart as armscye ease (Pages 95–96 and Aldrich Page 85)
Study Project
Dart Manipulation in an Existing Pattern
For your first study project, rotate the bodice dart in one of your favorite commercial top patterns to a different position using the slash and spread or pivotal transfer methods you learned in this module. Sew the modified pattern into a muslin or, if you’d like, you can take it all the way to a finished garment. How did rotating the dart change the feel of the top? Did the fit or shape of the garment change?
Required Patternmaking Elements
The muslin or completed garment must include an existing dart that has been correctly transferred to another location.
Deliverables
- One muslin or completed woven garment
- A “hacked” pattern piece showing how and where the bodice dart has been rotated relative to the original design
- Brief notes documenting drafting decisions and any adjustments made
Learning Outcomes
By the end of Module 2, you should have an intuitive understanding of how darts function and how the same amount of dart intake can be expressed in multiple ways. You should feel comfortable:
- Moving and splitting darts using the slash and spread and pivotal transfer methods
- Using darts to intentionally sculpt the bodice without changing its overall fit
Having a solid foundational understanding of dart manipulation theory will help you make fit adjustments during your block fitting journey in Module 3 and will support major dart-based design decisions in later modules.