Step 1: Understanding the Concept:
Stitch length (measured in stitches per inch, SPI) is adjusted based on the fabric weight, seam type, and construction requirements.
Short, fine stitches (15 to 20 SPI) provide greater seam strength, flexibility, and precision.
Step 2: Detailed Explanation:
Let us evaluate where short, fine stitches are required:
- (A) Curved seams: Curved seams require close stitching to allow for smooth turning, preventing puckering or an angular shape when turned right-side out. Thus, (A) is correct.
- (B) Used to control fullness: Controlling fullness (such as gathering or basting) requires long, loose stitches (6 to 8 SPI).
These long stitches can be pulled easily to adjust the gathers. Thus, (B) is incorrect.
- (C) Bias and semi-bias cut seams: Bias seams are highly elastic.
Short, fine stitches provide the necessary stretch, preventing the thread from snapping when the bias seam is pulled. Thus, (C) is correct.
- (D) Scallops: Scallop edges involve tight curves that must be clipped close to the seamline.
Fine stitches prevent the fabric from fraying or unraveling after clipping. Thus, (D) is correct.
- (E) Bound buttonholes: Bound buttonholes are precise, small openings.
Fine, close stitches are essential to reinforce the corners and prevent fabric fraying at the cut slit. Thus, (E) is correct.
Therefore, only (A), (C), (D), and (E) are correct.
Step 3: Final Answer:
Short, fine stitches are required for curved seams, bias seams, scallops, and bound buttonholes, corresponding to option (C).