Master Garment Interlining

Garment interlining is an often-overlooked yet critical element in the construction of high-quality apparel. It provides an unseen foundation that enhances a garment’s structure, drape, and overall longevity. Without the thoughtful application of garment interlining, many clothing items would lack their intended shape, crispness, or durability. This comprehensive guide will explore everything you need to know about garment interlining, from its fundamental purpose to selecting and applying the right type for your specific needs.

What is Garment Interlining?

Garment interlining refers to a layer of material inserted between the outer fabric and the lining of a garment, or sometimes directly behind the outer fabric itself. Its primary function is to provide support, stability, and structure to specific areas, or even the entire garment. This hidden layer plays a vital role in shaping, strengthening, and improving the wearability of clothing items.

The main purposes of incorporating garment interlining include:

Shape Retention: Helping collars stand up, lapels roll smoothly, and waistbands maintain their form.
Support: Preventing stretching in areas prone to stress, such as buttonholes and pocket openings.
Body and Drape: Adding substance to lightweight fabrics or softening the drape of heavier ones.
Durability: Reinforcing fabric to extend the garment’s lifespan and resist wear and tear.
Opacity: Providing an extra layer to prevent sheer fabrics from being see-through.

Types of Garment Interlining

Garment interlining comes in various forms, each designed for different fabrics, garment types, and desired outcomes. Understanding these categories is key to making an informed selection.

Woven Interlining

Woven interlining is made from yarns interlaced at right angles, similar to woven fabrics. It offers excellent stability and minimal stretch, making it ideal for structured garments.

Characteristics: Strong, stable, good for tailored items.
Common Materials: Cotton (e.g., canvas, muslin), hair canvas (blend of wool, cotton, and horsehair), linen, silk organza.
Best For: Tailored jackets, coats, structured collars, cuffs, and waistbands.

Non-Woven Interlining

Non-woven interlining is created by bonding fibers together using heat, chemicals, or mechanical processes, rather than weaving. This type is very versatile and widely used.

Characteristics: Can be crisp or soft, often more affordable, available in many weights.
Common Materials: Polyester, rayon, blends.
Best For: General stability, light support in blouses, dresses, and children’s wear, reinforcing buttonholes.

Knitted Interlining

Knitted interlining is constructed from interlocking loops of yarn, providing inherent stretch and flexibility. It is specifically designed to work with knit and stretch fabrics.

Characteristics: Stretchy, soft, maintains the drape of knit fabrics.
Common Materials: Tricot knit, stretch polyester.
Best For: Stabilizing knit fabrics without compromising their stretch, suitable for jersey dresses, T-shirts, and activewear.

Choosing the Right Garment Interlining

Selecting the correct garment interlining is paramount for achieving professional results. Several factors should influence your decision.

Consider the Main Fabric

Weight: Match the interlining weight to your main fabric. A heavy interlining on a light fabric will create stiffness; a light interlining on a heavy fabric will offer insufficient support.
Drape: If your fabric has a soft, flowing drape, choose a soft, pliable interlining. For crisp, structured fabrics, a firmer interlining is appropriate.
Fiber Content: Ensure the interlining’s care requirements are compatible with the main fabric (e.g., washable interlining for washable garments).
Stretch: For stretch fabrics, use a knitted or bi-directional stretch interlining to maintain flexibility.

Evaluate the Garment’s Design and Desired Outcome

Structured vs. Soft: Tailored jackets require firm, stable interlining (like hair canvas), while a soft blouse might need a lightweight, non-woven option.
Specific Areas: Collars need more rigidity than a pocket flap. Consider the function of each garment section.
Hand: The interlining should not significantly alter the hand (feel) of the main fabric in an undesirable way.

Application Methods: Fusible vs. Sew-in

Once you’ve chosen your garment interlining, the next step is to apply it. There are two primary methods:

Fusible Interlining

Fusible interlining has a heat-activated adhesive on one side. It is applied by pressing it onto the wrong side of the fabric with heat and pressure, effectively bonding the two layers together.

Advantages: Quick and easy application, less bulk, eliminates the need for hand sewing.
Considerations: Always test on a scrap of your fabric first to ensure proper adhesion and no discoloration or bubbling. Use the recommended temperature, pressure, and dwell time for best results. Not suitable for heat-sensitive or textured fabrics.

Sew-in Interlining

Sew-in interlining is simply cut and sewn into the garment layers. It does not have an adhesive backing.

Advantages: Offers more control over the garment’s drape, allows for breathability, ideal for delicate or textured fabrics that cannot withstand heat.
Considerations: More time-consuming to apply, can add slight bulk depending on the thickness, requires careful trimming and grading of seams to reduce bulk.

Common Uses of Garment Interlining

Garment interlining is utilized in countless areas to enhance a garment’s form and function:

Collars and Cuffs: Provides crispness and helps them stand or hold their shape.
Lapels: Gives tailored jackets their distinctive roll and prevents sagging.
Waistbands: Adds stability and prevents rolling or stretching.
Plackets and Buttonholes: Reinforces these areas to prevent stretching and ensure clean finishes.
Pockets: Strengthens pocket openings and helps pocket bags maintain shape.
Hems: Provides a stable edge for a neat, even hem.
Entire Garment Sections: Often used in the fronts of tailored jackets and coats to provide overall structure and support.

Tips for Working with Garment Interlining

To ensure successful results with your garment interlining, keep these tips in mind:

Pre-shrink: If using a sew-in interlining made from natural fibers, pre-shrink it just as you would your main fabric to prevent future shrinkage discrepancies.
Test, Test, Test: Always test fusible interlining on a scrap of your fashion fabric before applying it to your actual garment pieces. Check for adhesion, bubbling, stiffness, and any changes in color.
Grainline: Cut sew-in interlining on the same grainline as the corresponding fabric piece unless specific instructions indicate otherwise. For fusible interlining, pay attention to the manufacturer’s recommendations regarding grain.
Even Pressure and Heat: When fusing, ensure consistent heat and pressure across the entire surface for a strong bond. Use a pressing cloth to protect your fabric.
Cool Down: Allow fusible interlining to cool completely before handling the fused fabric to ensure the adhesive sets properly.
Trim Seams: For sew-in interlining, trim seam allowances to reduce bulk, especially in curved areas or corners.

Conclusion

Garment interlining is a powerful tool in the arsenal of any garment maker, from home sewists to industrial manufacturers. Its judicious use can elevate the quality, appearance, and durability of your creations significantly. By understanding the different types of garment interlining, how to choose the right one, and proper application techniques, you can ensure that your garments not only look professional but also stand the test of time. Take the time to select and apply your garment interlining thoughtfully, and you will undoubtedly see a remarkable improvement in your finished projects.