How to Design Patterns: Step 3 - Blocking
Blocking is one of the most overlooked but essential steps in finishing a fiber project. Whether you knit, crochet, or use Tunisian crochet, blocking can transform your work from homemade to professional-looking. Let’s dive into what blocking is, why you should do it, and how to choose the right method for your yarn!
What is Blocking?
Blocking is the process of shaping and setting your finished project by using water, steam, or heat. It helps relax the fibers, even out stitches, and improve the overall drape and fit. Think of it as the final touch that makes your piece look its best!
Why Should You Block Your Projects?
Blocking isn’t just for fancy lacework, it benefits all kinds of projects! Here’s why:
Sets stitches for a clean, even look.
Ensures accurate measurements by relaxing the fabric.
Enhances texture and stitch definition (especially for cables or lace!).
Increases durability by setting the fiber properly.
Gives a professional finish so your handmade items look their best!
Methods of Blocking
There are different ways to block your projects, and the method you choose depends on the fiber content. Here are the most common techniques:
Wet Blocking (Best for natural fibers like wool, cotton, and linen)
Soak your project in lukewarm water with a bit of wool wash or mild soap.
Gently squeeze out excess water (don’t wring!). You can also lay it on a towel, and roll it up to squeeze out as much water as you can for faster drying.
Lay flat on a blocking mat and pin it into shape.
Let it air dry completely before unpinning.
Steam Blocking (Great for acrylic and some wool blends)
Lay your project flat and pin it to the desired shape.
Use a garment steamer or iron with steam on low heat (without touching the fabric!).
Lightly steam over the piece, letting the fibers relax.
Allow it to cool and dry before removing the pins.
Spray Blocking (Works well for delicate fibers like alpaca or silk)
Lay your project flat and pin it into place.
Lightly mist with water until damp.
Let it dry completely before removing the pins.
Heat Setting (For 100% acrylic projects)
Pin your piece into shape.
Use a steam iron at a safe distance (never press directly!) to heat-set the fabric.
Be careful—too much heat can permanently melt acrylic fibers!
How to Choose the Right Blocking Method
The key to successful blocking is knowing your fiber content!
Fiber Type | Best Blocking Method | Avoid |
Wool, Cotton, Linen | Wet Blocking | High Heat |
Acrylic | Steam or Heat-Set | Wet Blocking (won't hold shape) |
Silk, Alpaca | Spray Blocking | Excessive stretching |
Wool Blends | Wet or Steam Blocking | Direct heat |
⚠ Caution: If you apply heat to wool, it may shrink or felt! If you only wet-block acrylic, it won’t hold its shape.
The Importance of Blocking Before Measuring Gauge
Gauge swatches should always be blocked before measuring! Here’s why:
Some fibers shrink or stretch after blocking.
It ensures your project ends up the right size.
Patterns are often written with the blocked gauge in mind.
💡 Pro Tip: Block your swatch the same way you’ll block your finished piece for the most accurate results!
Common Blocking Questions
Do I need to block every project?
Not always! Blocking is most important for garments, lacework, and textured stitches but may not be necessary for simple blankets or sturdy accessories.
Can I block an unfinished project?
Yes! This is called pre-blocking and is helpful if you need to check measurements before seaming and can make sewing together panels easier down the road.
How long does blocking take?
Wet blocking can take around 24-48 hours to fully dry, while steam or spray blocking dries much faster.
Do I need to re-block after washing?
Not necessarily! After washing, lay the item flat to dry and it should maintain it's shape.
Blocking might seem like an extra step, but it makes a huge difference in how your projects look and feel. Give it a try, and you’ll see why it’s a game-changer for fiber artists!
Have any blocking tips or questions? Drop them in the comments below!
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