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Choosing machine embroidery thread is one of the most enjoyable parts of the hobby. It’s where your designs get their color, their shine and their personality. It’s also where a few simple choices make a big difference in how smoothly your machine runs and how long your projects last. This guide covers polyester versus rayon, what thread weight means, bobbin thread and how to build a palette you’ll reach for again and again.
What makes embroidery thread different
Embroidery thread is made to run at high speed through a machine needle and lie smoothly on top of fabric. Compared with everyday sewing thread, it’s usually finer and glossier, so stitches blend into satin-smooth fills and crisp outlines. Sewing thread is built for strength in seams, while embroidery thread is built for beauty on the surface.
Polyester vs rayon machine embroidery thread
The two most common fibers are polyester and rayon. Both can look lovely, and each has its strengths.
Polyester
- Strong and durable: it holds up well at high stitching speeds, so it tends to break less often.
- Colorfast: it resists fading and generally holds up to bleach and frequent washing.
- Great for everyday items: towels, kids’ clothes, sweatshirts and anything that gets washed a lot.
- Nice sheen: modern polyester has a lovely glossy finish.
Rayon
- Soft, silky shine: rayon is prized for its luster, especially on heirloom pieces.
- Gentle feel: it drapes softly and suits delicate projects.
- Less tough: it’s generally less resistant to bleach and harsh washing than polyester.
Which should you choose? For beginners, polyester is the easy, forgiving choice. It’s durable, colorfast and suits the everyday projects most people start with. Many embroiderers add a few rayon spools later for special pieces.
Understanding thread weight
Thread weight describes thickness. The numbering can feel backward: the higher the number, the finer the thread.
- 40 weight: the standard for most machine embroidery designs. If a design doesn’t specify, it was probably digitized for 40 wt.
- 60 weight: finer thread for tiny lettering and very small details.
- 30 weight and heavier: thicker thread for bold, textured looks, used with designs made for it.
Stick with standard weight thread for your first projects, and check your design’s notes if it recommends something different.
Bobbin thread basics
The bobbin thread sits underneath and holds the top stitches in place. For embroidery, you’ll usually use a lightweight bobbin thread (often 60 or 90 weight) in white or black, rather than matching every top color.
- White bobbin thread for light fabrics.
- Black bobbin thread for dark fabrics.
- Matching bobbin thread for items where both sides show, like towels or freestanding lace.
Lightweight bobbin thread keeps designs from getting bulky and helps the top thread lie smoothly. If you see bobbin thread peeking through on top, your tension may need a small adjustment; check your machine’s manual.
A starter kit for building your palette
New brothread 80-Color Embroidery Thread Kit
- 80 colors of machine embroidery thread
- Polyester thread
- Comes in a storage box
Building a color collection one spool at a time can be slow, which is why many beginners start with a kit. The New brothread 80-Color Thread Kit gives you 80 colors of polyester machine embroidery thread in a storage box, so your palette is organized from day one.
Eighty colors covers a lot of ground: soft florals, leafy greens, mushroom browns, berry reds, sky blues and the neutrals you’ll use for lettering and outlines. That range makes it easy to stitch designs as they were drawn, or to swap in your own cottagecore colors.
Because it’s polyester, it’s a sensible match for items that get washed often, like tea towels, baby bibs and sweatshirts. The storage box keeps spools tidy and dust-free, and it’s satisfying to open the lid and see every color lined up.
Good to know: A kit covers the top thread. You’ll still want white and black bobbin thread for the underside of your designs.
How to build a cozy color palette
Even with 80 colors, it helps to think in small palettes for each project:
- Wildflower meadow: soft pink, butter yellow, lavender, sage green.
- Woodland walk: mushroom red, cream, moss green, bark brown.
- Cottage kitchen: tomato red, gingham blue, warm white, honey gold.
- Winter evening: deep green, cranberry, ivory, soft gray.
Our cottagecore embroidery ideas pair beautifully with these palettes.
Storing and caring for your thread
- Keep spools out of direct sunlight to prevent fading.
- Store them in a closed box to keep dust off.
- Tuck loose thread ends into the spool notch so they don’t unravel.
- Avoid very dry or humid spots, which can make thread brittle or fuzzy.
Troubleshooting thread problems
- Frequent breaks: rethread the machine, check for a dull or bent needle and make sure the spool unwinds smoothly.
- Looping on top: the thread may not be seated in the tension discs; rethread with the presser foot up if your manual says so.
- Bobbin showing on top: tension may need adjusting, or the bobbin may be inserted incorrectly.
- Fuzzy, shredding thread: try a fresh needle and check that the thread isn’t old or dry.
Thread, stabilizer and your machine
Good machine embroidery thread works hand in hand with the right stabilizer and a well-matched machine. Our stabilizer guide covers the support layer. If you’re still choosing a machine, start with our beginner machine roundup, or see the 4×4 vs 5×7 guide to figure out how big your designs (and thread needs) will be.
Frequently asked questions
Is polyester or rayon better for beginners?
Polyester is usually the easier start. It’s strong, colorfast and holds up to frequent washing, which suits everyday projects.
Is sewing thread OK for machine embroidery?
It can work in a pinch, but embroidery thread is finer and glossier, giving smoother fills and crisper outlines. Sewing thread may look dull or bulky.
Does bobbin thread need to match the top color?
Usually not. White or black lightweight bobbin thread works for most projects. Match the bobbin only when both sides of the item will show.
How many thread colors do I need to start?
A dozen colors can get you started, but a kit with a wide range, like an 80-color set, lets you stitch most designs without hunting for shades.
How should I store machine embroidery thread?
Keep it in a closed box away from sunlight, heat and humidity. A storage box like the one in many thread kits keeps spools tidy and protected.
Cozy Hobby Finds writes gentle, research-based guides for new embroiderers, birders, potters and herb gardeners. We compare features and listings so your hobby can start a little easier. More about us.