Table of Contents
Setting Up the ITH Project
You’re not just “making a zipper bag file”—you’re engineering a mechanical stitch sequence that has to behave perfectly when fabric, batting, stabilizer, and a zipper all start shifting under the high-speed force of a needle.
In this tutorial, you will build a robust 6x10 In-The-Hoop (ITH) pencil case file in In The Hoop Designer Software. We will start from a proven template, resize it to a pencil-case-friendly length, and critically, validate the stitch order so the quilting and zipper steps happen at the right time.
What you’ll learn (and why it matters)
- Template Engineering: How to load a zipper bag template using the In the Hoop Wizard.
- Safe Resizing: How to resize the bag length without accidentally destroying the zipper’s functional width.
- Precision Alignment: How to center zipper components quickly using "Center Origin" to ensure even seam allowances.
- Texture Control: How to customize quilting with Advanced Stippling and control stitch direction to minimize fabric push.
- Symmetry Logic: How to mirror quilting cleanly and remove redundant stitches that add unnecessary bulk.
- Sequence Safety: How to use Slow Redraw and the Sequence window to prevent the disaster of “stitching over finished construction.”
If you’re building ITH projects to sell, mastering this workflow is the difference between a file that stitches reliably across fifty different fabric types and one that only works on your scrap pile.
Using the Wizard for Bag Templates
Open In the Hoop Designer Software and click the In the Hoop Wizard (upper left). Under Template, click Open, then choose Zipper Bags Number 5.
Why "Number 5"? In industry terms, the "5" refers to the width of the zipper teeth (approx. 5mm). This is the standard #5 zipper tape often used for bags and cases because it is durable and easy to pull. If you use a #3 dress zipper with a #5 template, the needle may land too far from the teeth; if you use a #5 zipper with a #3 template, you risk breaking a needle on the plastic teeth.
Select the 6 by 10 bag and click OK.
Checkpoint: The base 6x10 zipper bag design loads into your workspace.
Pro tip (Visual Navigation): If you see a “color line with numbers” along the bottom of the screen, that’s the thread palette. In ITH design, colors aren't just for aesthetics—they are instructional stops.
- Action: You can change the thread brand or swap a color used in the design.
- Strategy: Assign distinct, high-contrast colors to your "Machine Stop" steps (like placing the zipper or folding the fabric). This forces the machine to pause, giving you a visual cue to perform a manual task.
Resizing for a Pencil Case Shape
The goal is to create a slightly shorter, more rectangular bag suitable for pencils. Select the bag object, then go to Transform (upper right).
- Action: Uncheck “Maintain aspect ratio.”
- Action: Set the height to 9 inches.
- Action: Click Apply.
You may see a browser pop-up or software warning stating that resizing a design with a zipper “may not stitch correctly.” Stop and read this.
Warning (Safety Critical): Resizing ITH zipper projects indiscriminately can create real-world fit problems. The zipper tape may no longer match the seam lines, the zipper ends might not get caught in the satin stitch, or the metal zipper slider could end up directly in the needle path. Always test-stitch on scrap first. In this specific workflow, we are adjusting length (safe) while maintaining width (vital for zipper clearance). Treat on-screen warnings as serious prompts to verify your clearance zones.
Checkpoint: The bag is now sized to fit a 6x10 hoop footprint while being 9 inches tall.
Primer: What the software doesn’t show (The "Fabric Sandwich")
Even though this is a software tutorial, your success is governed by hooping physics. You are creating a "sandwich" of materials:
- Stabilizer/Backing: The foundation.
- Batting: The body/loft.
- Fabric: The visual layer.
- Lining: The interior.
If this sandwich is too soft, the dense quilting will cause the zipper area to ripple (the "bacon effect"). If it's too stiff, turning the bag right-side-out becomes a wrestling match.
The Hooping Variable: If you are doing production runs—making 20 of these for a craft fair—hooping consistency is your enemy. A stable hooping method (and, for some workflows, a dedicated hooping station for machine embroidery) can significantly reduce re-hoops, misalignment, and the "why did this one shift?" headache. If you struggle to keep zippers straight while tightening the screw, focus on your hooping surface first.
Customizing the Design
This section is where you turn a generic zipper bag template into a pencil case layout that looks intentional: centered zipper, specific quilting density, and stitch angles that support the structure.
Centering the Zipper
First, clean up the template:
- Action: Delete default decorative elements (such as any pre-loaded text or butterflies).
Then, align your mechanical components (the zipper) to the absolute center:
- Action: Select the first four steps in the sequence. These represent the zipper placement, tack down, and folding lines.
- Action: Go to the ruler at the top, right-click, and choose Center Origin.
Checkpoint: The zipper components are centered horizontally in the bag.
Adding Advanced Stippling
Quilting adds structure and professional "heft" to the bag. Select the main quilting object. In the upper right, open the Fill settings:
- Action: Under Fill Type, choose Advanced Stippling.
- Action: Under Pattern, choose Stipple 112.
Now, let's talk about the specific numeric value. Set the pattern length to 39 mm.
Expected Outcome: On-screen quilting changes from the default look to a loose stipple texture.
Expert Note (The "Sweet Spot"): Why 39mm?
- < 20mm: Very dense. Stiff outcome. Takes a long time to stitch. High risk of fabric puckering if stabilizer is weak.
- 35mm - 45mm (Sweet Spot): This is the "Goldilocks" zone for pencil cases. It provides enough quilting to holding the batting in place but remains soft enough to turn the bag easily.
- > 50mm: Very loose. Good for high-loft batting, but may look sparse on flat cotton.
Adjusting Fill Angles
Go to the Shape tool (upper left). You’ll see a large yellow line with nodes that controls the fill angle. Grab either end and move it.
- Action: Move the line until it is vertical (90 degrees).
Checkpoint: The stippling angle looks straight and consistent across the quilting area.
Why this matters in real stitch-outs: Stitch direction influences "Push and Pull." Fabric tends to shrink in the direction of the stitch. If your stippling angle fights against the zipper direction diagonally, you may see waves or rippling near the zipper tape. Keeping it vertical or horizontal often yields a flatter result on simple rectangular shapes.
Mirroring and Cleanup
Symmetry is a big part of what makes an ITH pencil case look “store-bought” rather than “homemade.” But symmetry only works if you keep your object list clean.
Deleting Unwanted Stitches
The template may have included a decorative bean stitch (triple stitch) intended for the original design.
- Action: Select the bean stitch you no longer need.
- Action: Press Delete.
Checkpoint: The redundant bean stitch is gone.
Warning (Logic Check): In ITH projects, never delete "random-looking" lines unless you are 100% sure what they do.
* Construction Lines: Often long running stitches. These are critical for placement.
* Tack-downs: Zig-zags or loose runs. Critical for holding zippers.
* Decoration: Satins or motifs. Safe to delete.
If you create a gap in the logic, your bag might fall apart when you unzip it.
Creating Symmetry with Mirror Tools
To duplicate your perfectly configured quilting to the other side of the zipper:
- Action: Select the quilting object and any associated border stitches (like the remaining bean stitch).
- Action: Use Copy, Paste, and Mirror (usually found in the Layout or Edit tab).
Then, drag the mirrored group to the right side and align it carefully.
Checkpoint: Quilting aligns cleanly with the center line on the right side, strictly matching the left.
Tool Upgrade Path (Efficiency): Mirroring is faster than redrawing, but physical alignment is where production slows down. If you find yourself re-hooping fabric constantly because it’s hard to clamp thick quilting sandwiches evenly, that is a sign to evaluate a magnetic embroidery hoop. Magnetic systems clamp down vertically rather than using friction and inner rings, which significantly reduces "hoop burn" (the shine/damage left on fabric) and makes loading thick ITH layers much faster.
Finalizing the File
This is the “avoid the disaster” stage. Even a beautiful layout will fail if the machine tries to stitch the lining before the zipper is tacky-down.
Correcting Stitch Sequence
Use the Slow Redraw simulator to preview exactly what will happen at the machine.
Visual Check: Watch the simulation. Does the right-side quilting stitch after the final bag closing seam? If so, you have a problem.
- Action: Select the copied quilting and its bean stitch in the Sequence window.
- Action: Drag them up the list so they become the third major group to stitch.
Checkpoint: The Sequence list should logically flow:
- Zipper Placement
- Zipper Tack-down
- Quilting (Left & Right)
- Decor (Optional)
- Back/Construction Placement
- Final Seam
Expert Note: Sequence errors are expensive. They waste fabric, batting, zippers, and 20 minutes of machine time. Slow Redraw is your cheapest insurance policy.
Elastic Placement Instructions
A pencil case often needs an elastic strap for a ruler or specialty pens. The video advises adding this during the process.
- Timing: Add the elastic immediately after the machine instructs you to unzip the zipper halfway.
- Position: Ensure the elastic extends at least 0.5 inch (1.2 cm) past the top and bottom zipper placement lines.
- Security: Take the excess elastic slack, fold it up in the center of the bag away from the edges, and tape it down.
Checkpoint:
- Zipper is unzipped halfway (Crucial! If you forget this, you cannot turn the bag inside out).
- Elastic ends are crossing the seam line.
- Elastic loop is taped safely in the center "safe zone."
Hidden Consumable (Tape): Do not use duct tape or cheap scotch tape that leaves residue on the needle. Use Medical Paper Tape (Micropore) or specific Embroidery Tape. It holds firm but tears away easily and doesn't gum up your rotary hook.
Prep: Hidden Consumables & The Decision Tree
Before you export the file to your USB drive, let's prep the physical environment. Most "software failures" are actually material failures.
The "Hidden" Kit:
- Curved Snips: Essential for cutting threads flush inside the hoop.
- Lighter: To carefully singe the raw edges of nylon zipper tape (prevents fraying inside the bag).
- Water Soluble Pen: To mark the center of your stabilizer if you aren't using a laser.
- Fresh Needle: Size 90/14 or 80/12 Topstitch. You are punching through stabilizer, batting, fabric, zipper tape, and lining. A dull needle will deflect and break.
Decision Tree: Fabric → Stabilizer Choice
-
Scenario A: Stretchy Outer Fabric (Knits, Neoprene)
- Recommendation: Cutaway Stabilizer (Mesh or Heavy).
- Why: Stretchy fabric will distort under the stippling. Tearaway is not strong enough to prevent the "hourglass" shape distortion.
-
Scenario B: Stable Outer Fabric (Quilting Cotton, Canvas)
- Recommendation: Tearaway Stabilizer.
- Why: The fabric has its own stability. Tearaway allows for a cleaner inside finish and easier removal from the zipper teeth area.
-
Scenario C: Very Lightweight (Lawn, Thin Linen)
- Recommendation: Shape Flex (SF101) fused to the fabric + Tearaway.
- Why: The thin fabric needs body to support the stippling stitches without puckering.
Prep Checklist (Pre-Flight):
- Hoop Format: Confirm file is saved as correct format (PES, DST, EXP) for your machine.
- Hoop Size: Design fits within the 6x10 (160x260mm) sewing field, not just the physical hoop frame.
- Simulation: Ran Slow Redraw one last time to spot order errors.
- Palette: Thread colors on screen match the logical stops you need (e.g., Color 1 = Placement, Color 2 = Tack down).
- Materials: Zipper, fabrics, batting, and tape are on the table.
Setup: Hooping Strategy & Safety
The number one reason for unauthorized "slanting" in pencil cases is poor hooping. The stabilizer must be "drum tight" (you should be able to flick it and hear a low drum sound), but the fabric floating on top must be relaxed, not stretched.
Tool Upgrade Path (Production): If you are moving from hobby to business (selling these cases), standard hoop screws can cause repetitive strain injury (RSI) and "hoop burn" on delicate vinyls or velvets.
- The Solution: Many professionals upgrade to a Magnetic Hoop System.
- The Benefit: It automatically adjusts to the thickness of your batting and zipper without you needing to loosen/tighten a screw.
- Options: Look for a dime magnetic hoop or a dime snap hoop specifically compatible with your machine connection.
Warning (High Magnetic Force): Magnetic hoops contain powerful industrial magnets.
* Pinch Hazard: Keep fingers clear of the snapping zone. They slam shut instantly.
* interference: Keep them away from pacemakers, insulin pumps, credit cards, and computerized machine screens.
Setup Checklist:
- Bobbin: Is it full? Running out of bobbin thread during the final satin stitch of a zipper bag is a nightmare to fix.
- Needle: Is the needle straight? (Roll it on a flat table to check).
- Clearance: Ensure the machine arm has space to move 10 inches without hitting a wall or coffee cup.
Operation: Sensory Checkpoints
Start the machine. Don't just watch; listen and feel.
Phase 1: Zipper & Quarting
- Listen: A rhythmic thump-thump-thump is good. A sharp click-click-click usually means the needle is hitting something hard (zipper teeth?) or is slightly bent.
- Visual: Watch the fabric during stippling. If you see a "wave" of fabric building up in front of the foot, your batting fits too loosely, or the stabilizer is too loose. Pause and tape the fabric taut (but not stretched).
Phase 2: The Critical Pause
-
Action: When the machine stops for the elastic/zipper opening step:
- Stop everything.
- Unzip the zipper 50-70%. (If you forget this, the bag is sealed shut forever).
- Insert Elastic. Fold excess tape.
- Check: Ensure the zipper pull metal tab is not in the path of the next stitch line.
Phase 3: Final Seam
- Speed: Slow the machine down (bring SPM down to 600 or so). You are stitching through 4-6 layers of material + zipper tape + webbing. Speed kills needles here.
Operation Checklist:
- Zipper Check: Did I move the zipper pull to the center?
- Tape Check: Is all holding tape outside of the stitch path? (Adhesive on the needle causes thread shreds).
- Backing Check: Is the lining underneath smooth? (Check underneath the hoop before the final seam).
Troubleshooting
Use this "Symptom → Fix" table to solve issues quickly without panic.
| Symptom | Likely Cause | Investigation & Quick Fix |
|---|---|---|
| Zipper is off-center | Grouping error | Cause: You centered the placement line but not the tack-down line. <br>Fix: In software, select all zipper parts (Group) and re-center. |
| Needle breaks on zipper | Physical collision | Cause: The "safe zone" in the file is too narrow, or #5 zipper is too wide. <br>Fix: Slow down. Use the hand wheel to walk the needle past the teeth. Ensure you used the correct template size. |
| Stitches over seam | Sequence error | Cause: Quilting ran after the bag was closed. <br>Fix: Move quilting steps up in the Sequence window (before back placement). |
| Puckering near zipper | Stabilization | Cause: Fabric was stretched in the hoop or stabilizer is too light. <br>Fix: Switch to Cutaway stabilizer. Don't pull fabric "tight" when floating; just lay it "flat." |
| Elastic pulls out | Short tail | Cause: Not enough elastic extended past the seam allowance. <br>Fix: Ensure 0.5" - 1.0" of elastic overhangs the cut line. |
| Hoop pops open | Thick Sandwich | Cause: The standard plastic hoop can't grip the thick layers of batting/zipper. <br>Fix: Use binder clips on the hoop edge (risky) or upgrade to a magnetic hoop. |
Results
If you followed this workflow, you now have a digitized ITH pencil case layout built from Zipper Bag Template #5 sized for a 6x10 hoop, resized to 9 inches tall. It features customized Advanced Stippling (Stipple 112) at a beginner-friendly 39 mm pattern length, mirrored quilting for symmetry, and a rigorously tested stitch order.
Deliverable Standard
A professional finish means:
- Symmetry: Left and right quilting density looks identical.
- Function: The zipper opens smoothly without catching on loose internal threads (thanks to deleting that bean stitch).
- Structure: The bag stands up slightly on its own (thanks to the stabilizer/batting choice).
Scaling Up: From Hobby to Business
If you make one pencil case, the standard hoop is fine. But if you plan to sell these, your bottleneck will be hooping time. Wrestling with screw-tightening on thick zipper projects causes fatigue and slows production.
This is the tipping point where serious embroiderers invest in infrastructure. Look into Machine-specific upgrades like dime hoops or generally compatible embroidery machine 6x10 hoop magnetic frames. These tools allow you to "slap and go," keeping your fabric tension perfect without the wrist strain. For a business, time is money—and a tool that saves you 3 minutes per hoop-up pays for itself in a few busy weekends.
