One of the biggest differences between a project that looks homemade and one that looks professionally finished often has very little to do with the sewing machine.
It is pressing.
Over the years, I’ve watched a lot of talented makers improve their sewing simply by changing when and how they use an iron. It is easy to think of pressing as something you do after the project is finished. In reality, some of the best pressing happens during construction.
That is why you will often hear experienced garment makers, quilters, and sewing educators say:
Press as you sew.
It sounds simple, but it can completely change your results.
Pressing can help seams lie flatter, corners look sharper, collars behave properly, quilt blocks stay accurate, and finished projects hold the shape they were designed to have.
So let’s look at why pressing matters and how to do it correctly.
Pressing and Ironing Are Not the Same Thing
People often use the words pressing and ironing interchangeably, but they are really two different actions.
Ironing
Ironing usually means moving the iron back and forth across fabric.
That is useful when you are removing wrinkles from clothing or preparing a large piece of fabric before cutting.
Pressing
Pressing means placing the iron down, applying heat and possibly steam, lifting it, and moving to the next area.
You are not aggressively sliding the iron across the fabric.
That difference matters because sliding an iron can stretch or distort fabric, especially when working with:
- Bias edges
- Quilt blocks
- Knits
- Delicate fabrics
- Curved garment pieces
- Fusible interfacing
When you are constructing a sewing project, pressing is usually the better technique.
Why Pressing Makes Such a Difference
Every seam changes the shape and structure of your project.
When you sew two pieces of fabric together, thread tension, seam allowances, curves, and fabric thickness can cause the area to lift, wrinkle, or pull.
Pressing helps the fabric settle into its new shape.
Proper pressing can:
- Flatten seams
- Set stitches
- Improve accuracy
- Reduce bulk
- Sharpen edges
- Shape curved areas
- Improve topstitching
- Make hems easier to sew
- Improve appliqué
- Help quilt blocks fit together more accurately
- Give garments a more professional appearance
A good sewing machine can create beautiful stitches, but it cannot press the seam after it makes it.
That part is up to us.
Press Every Seam Before Crossing It With Another Seam
This is one of the best habits you can develop.
If another seam is going to cross the seam you just stitched, press the first seam before moving on.
For example, when constructing a garment, you may sew a shoulder seam before attaching a collar or sleeve.
In quilting, you may join two pieces before combining that unit with another section of the block.
Pressing each step before adding the next one helps prevent small inaccuracies from accumulating.
A slightly uneven seam may not look serious at first.
But after that seam is joined to three or four additional pieces, the error can grow.
Set the Seam Before Pressing It Open
Here is a technique many beginners are never taught.
After sewing a seam, press it exactly as it was sewn before opening the seam allowances.
This is sometimes called setting the seam.
Place the iron directly over the stitched seam and press briefly.
Then open or position the seam allowances according to the project instructions.
Setting the seam helps the thread settle into the fabric and can produce a cleaner-looking seam once it is pressed open.
It only takes a few seconds.
Should Seams Be Pressed Open or to One Side?
The answer depends on the project.
Pressing Seams Open
Garment construction often calls for seam allowances to be pressed open.
This helps:
- Reduce bulk
- Create flatter seams
- Improve drape
- Prepare seams for finishing
- Give garments a clean interior
Pressing Seams to One Side
Quilting frequently calls for seams to be pressed toward one side.
This can:
- Strengthen the seam
- Reduce the chance of batting showing through
- Help seams nest when joining quilt blocks
- Improve piecing accuracy
Some modern quilting techniques use open seams as well.
The important thing is to follow the construction method that works best for the project.
Use the Correct Temperature for the Fabric
Heat is not one-size-fits-all.
Cotton can tolerate much higher temperatures than many synthetic fabrics.
Before pressing, consider the fiber content.
Cotton and Linen
These fabrics generally tolerate higher heat and steam.
Wool
Wool responds very well to steam and shaping, but it should be pressed carefully to avoid damaging the surface.
Polyester and Synthetic Fabrics
Use lower temperatures.
Too much heat can:
- Melt fibers
- Create shine
- Permanently flatten texture
- Distort the fabric
Silk and Delicate Fabrics
Use lower heat and a pressing cloth.
Whenever you are uncertain, test the iron on a scrap of the same fabric first.
A Pressing Cloth Is One of the Simplest Tools You Can Own
A pressing cloth creates a protective layer between the iron and the fabric.
It can help prevent:
- Shine
- Scorching
- Iron marks
- Flattened texture
- Adhesive buildup on the iron
Pressing cloths are particularly useful with:
- Delicate fabrics
- Wool
- Synthetic materials
- Fusible interfacing
- Appliqué
- Embroidery
- Fabrics with special finishes
You can purchase dedicated pressing cloths, but some makers also use clean cotton or other appropriate material depending on the project.
The important part is making sure your pressing cloth itself can tolerate the heat you are using.
The Tailor's Ham: Pressing Curves Properly
Not everything we sew is flat.
The human body certainly is not.
A tailor's ham is a firmly stuffed, curved pressing tool that helps shape areas such as:
- Darts
- Bust curves
- Princess seams
- Sleeve caps
- Collars
- Hip curves
Instead of forcing a curved garment section flat against an ironing board, the tailor's ham allows you to press the fabric over a shape that better matches the finished garment.
This is especially important in garment construction.
If you spend time carefully sewing a beautiful curved seam and then flatten it aggressively with an iron, you can undo some of the shaping you just created.
What Is a Seam Roll?
A seam roll is another shaped pressing tool.
It is long and cylindrical and is especially useful for pressing narrow areas.
Good uses include:
- Sleeve seams
- Pant-leg seams
- Narrow garment sections
- Long seams where you do not want seam allowances showing through
The rounded surface lets you press the seam without pressing the surrounding fabric completely flat.
What Does a Tailor's Clapper Do?
A tailor's clapper looks simple—often little more than a shaped block of hardwood—but it can produce remarkably crisp seams. The first time I heard this term used I thought they were talking about the little devise you could buy on late night TV to turn your light on and off! I will have to give credit to Angela Wolf teaching me about the Clapper.
Here's the basic idea:
- Apply heat and steam to the seam.
- Remove the iron.
- Immediately place the clapper over the pressed area.
- Allow it to absorb heat and moisture while the fabric cools.
The result can be a much sharper, flatter crease.
Clappers are especially useful for:
- Wool
- Tailoring
- Denim
- Heavy cotton
- Collars
- Cuffs
- Hems
- Thick seams
It is one of those old-school sewing tools that still works extremely well.
Pressing Quilt Blocks
Pressing is especially important in quilting because small differences can multiply across an entire quilt.
Imagine a quilt block containing 20 seams.
If every seam is off by even a tiny amount, the finished block may no longer measure correctly.
When pressing quilt blocks:
- Avoid aggressively sliding the iron
- Press rather than stretch
- Be careful around bias edges
- Follow the pattern's seam-direction instructions
- Check block measurements as you work
Pressing should make the block more accurate—not stretch it into shape.
Be Careful With Steam Around Bias Edges
Fabric cut on the bias can stretch considerably.
That is useful when making things like bias binding, but it also means the fabric can distort easily.
When pressing bias edges:
- Lift and press rather than sliding
- Avoid pulling the fabric
- Do not overwork the area
- Allow it to cool before moving it
This is particularly important with:
- Necklines
- Armholes
- Curved seams
- Quilt triangles
- Bias-cut garments
Pressing Knit Fabrics
Knits require a lighter touch.
Heat and steam can stretch or distort some knit fabrics.
Use:
- Appropriate temperature
- Minimal pressure
- A pressing cloth when necessary
- Care around ribbing and elastic areas
And do not assume every knit behaves the same way.
A stable ponte knit and a lightweight jersey can respond very differently to heat.
Test first.
Pressing Fusible Interfacing
Fusible interfacing is an area where proper pressing technique becomes especially important.
Fusible interfacing contains adhesive that is activated by heat, pressure, and sometimes moisture.
One of the most common mistakes is treating fusible interfacing like ordinary ironing.
Do not simply slide the iron back and forth.
Instead:
- Follow the manufacturer's instructions.
- Position the interfacing correctly.
- Place the iron down.
- Apply the recommended pressure.
- Hold it for the recommended amount of time.
- Lift the iron.
- Move to the next section.
Once the interfacing has been fused, allow the piece to cool completely before moving it.
The adhesive continues setting as it cools.
We covered interfacing in another Blaine Explains article because choosing the correct interfacing is just as important as applying it correctly.
Press From the Wrong Side When Possible
Whenever practical, press from the wrong side of the fabric.
That reduces the risk of:
- Shine
- Scorch marks
- Impressions
- Damaged surface texture
If you need to press from the right side, consider using a pressing cloth.
This is particularly important with dark fabrics, wool, and materials where seam allowances can create visible impressions.
Do Not Press Over Pins
Just as you should not sew over pins, you generally do not want to press directly over them either.
Pins can:
- Leave impressions
- Scratch an iron
- Distort the fabric
- Conduct heat into areas you do not want heated
Remove pins as you reach them whenever practical.
Let the Fabric Cool Before Moving It
This is one of the most overlooked parts of pressing.
Heat and steam temporarily relax fabric fibers.
As the fabric cools, those fibers begin holding the new shape.
If you immediately pick up and move the piece while it is still hot, you can undo some of the pressing you just performed.
After pressing an important seam, collar, cuff, hem, or shaped area, give it a few moments to cool.
The tailor's clapper works partly because it holds the fabric in position during this cooling process.
More Steam Is Not Always Better
Steam can be extremely useful.
But more steam does not automatically mean better results.
Too much moisture can:
- Distort certain fabrics
- Create water marks
- Damage specialty materials
- Affect finishes
- Cause some fabrics to shrink
Know your material.
When in doubt, test.
Press Before You Cut
Pressing does not begin after sewing.
Before cutting a project, make sure the fabric is reasonably smooth and lying naturally.
Wrinkles can distort pattern placement and affect cutting accuracy.
This is especially important when working with:
- Garments
- Quilt pieces
- Stripes
- Plaids
- Directional prints
- Long pattern pieces
Accurate sewing starts with accurate cutting.
And accurate cutting starts with properly prepared fabric.
Pressing Can Fix Appearance—But Not Bad Construction
An iron is powerful, but it is not magic.
Pressing cannot completely correct:
- Incorrect seam allowances
- Poorly matched seams
- Badly stretched fabric
- Incorrect pattern cutting
- Excessive puckering from bad tension
- The wrong stabilizer
- A poorly installed zipper
Pressing improves good construction.
It does not replace it.
That distinction matters.
Common Pressing Mistakes
Sliding the Iron Too Much
This can stretch and distort fabric.
Better approach: Lift and press.
Using Too Much Heat
High heat can damage synthetic and delicate fabrics.
Better approach: Match the temperature to the fiber content.
Skipping Pressing Until the Project Is Finished
By then, many seams may be difficult or impossible to reach properly.
Better approach: Press during construction.
Pressing Curves on a Flat Surface
This can flatten shaping that was intentionally built into the project.
Better approach: Use a tailor's ham or other shaped pressing tool.
Moving Fabric While It Is Still Hot
This can undo the shape you just created.
Better approach: Allow the area to cool first.
Ignoring the Manufacturer's Instructions
This is particularly important with fusible products and specialty fabrics.
Better approach: Read the instructions and test first.
A Simple Press-As-You-Sew Routine
You do not need to turn every project into a complicated pressing exercise.
Try this simple routine:
Step 1: Sew the seam.
Step 2: Press the seam exactly as sewn to set the stitches.
Step 3: Open or position the seam allowances according to the project.
Step 4: Press into the finished position.
Step 5: Allow the fabric to cool.
Step 6: Continue construction.
That small routine can noticeably improve your finished projects.
The Iron Is Part of Your Sewing Equipment
When people shop for sewing equipment, naturally they focus on the sewing machine.
I understand that. I've spent much of my career around sewing machines.
But if you want better results, don't think of the iron as something separate from sewing.
Your pressing equipment is part of your sewing system.
The sewing machine creates the seam.
The iron helps shape that seam into the finished project.
A great machine, the correct needle, good thread, accurate cutting, proper pressing, and good technique all work together.
That is one of the things I've learned from spending more than 20 years around manufacturers, educators, technicians, designers, dealers, and makers in this industry.
There usually isn't one magic product that suddenly makes somebody a better maker.
It is understanding all of the little things—and understanding why they matter.
That is what I want Blaine Explains to be about.
If I can pass along some of the lessons I've picked up from people throughout this industry and help you avoid a few mistakes along the way, then we're doing exactly what I want Sew Nation USA to do.
So next time you finish a seam and are tempted to keep sewing, take the extra minute.
Press it first.
You may be surprised by how much better the finished project looks.
— Blaine Austin
Sew Nation USA
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