I’m sewing a small logo on lightweight 100% polyester 4.1 oz golf polos. Would a 70/10 BP be ok? Also, what type of backing do you suggest?
You are correct in thinking that a small ball point needle should work best. However, as you will be sewing through stabilizer as well, you may actually need to use a sharp. If the machine starts skipping stitches or leaving loops of thread on the top of the design then you will need to change to a sharp.
There are many options for stabilizing knits, but one good rule of thumb — at least one of the layers needs to be a permanent cut-away stabilizer. As you are embroidering a lightweight knit you will want to keep your stabilizer lightweight as well. It is always best to adhere the stabilizer to the fabric and allow the entire stabilized area to be enclosed in the hoop.
However, if your logo is very small, you may wish to hoop the stabilizer and use a basting tool to baste a “frame” around the area the logo will stitch — this will prevent you from having to hoop the shirt. The basted frame will be removed when the design is finished and the stabilizer can be trimmed close to the design on the wrong side.
Just FYI for very professional looking results, you may wish to try a tricot knit stabilizer as your permanent layer. As that type of stabilizer is stretchy and very thin it tends to disappear when the design is finished and usually does not show through to the front on white or light colored knits. When I use this product with knits I like to iron on a piece that is just big enough to accommodate the design. I press it on lightly and then apply a layer of Sulky’s Totally Stable iron-on tear-away stabilizer on top of that. I make sure the Totally Stable stabilized area is slightly larger than the hoop. I hoop the article taking care to prevent hoop burn on delicate fabrics by loosening the hoop screw generously before pushing the inner hoop into position within the outside hoop.
After embroidering I remove all of the excess tear-away, warm up the tricot stabilizer with the iron slightly, peel away any excess and trim it as close as I can to the design. Sulky makes a great tricot knit stabilizer: Sulky Soft & Sheer Extra and I also like Cover-A-Stitch by AllStitch.
I hope this helps you! Good luck!
A Bit of Stitch