Tag Archives: air pockets

A Different Sheep- Blue Faced- and the Yarn

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It is becoming a bit more common to find the breed of the sheep listed as the fiber content of yarns, but without some knowledge of the breed it can make it difficult to assess what to expect from the yarn, it can actually make it difficult to assess the yarn itself, as often you may not even realize that it is a wool breed.

Blue Faced Luster or Bluefaced Leicester is an English Sheep breed, and the Leicester (sometimes seen as Luster, especially in the American market) is actually a reference to a geographic location of this long fleece breed. The staple, the actual individual “hair” of the fleece, is long; anywhere from 5-18” (13-46cm), so this means that the yarn can hold together even with less “twist” then some other wool. Essentially what this means is that because the fiber is longer it does not need to be twisted as often to catch hold of other fibers, as a result they may not hold as much air being less warm as some shorter stapled fibers…but not by much as the fiber also has a fine crimp.

Bluefaced Leicester yarn www.lindadeancrochet.com

West Yorkshire Spinners Bluefaced Leicester Aran Prints yarn. (color pheasant)

Wool fibers can retain heat due to air pockets. Like insulation the more “pockets” that can trap air the more it can trap heat. So when a staple is twisted with other staples the spaces between cause pockets of air. The crimp of a fiber, is how much “wave” it has. It is a zig zag effect, and the more crimp the more the fiber can create air pockets and retain heat.

The staple also has a fine micron count, this results in a soft yarn. The micron count in the diameter of an individual strand of fiber. The easiest way to think of a comparison in micron count is to think of the hair of a small child and a grown adult. The child’s hair is noticeably softer then the adults, this is because its micron count is smaller, it is thinner, then the adult.

So with Bluefaced Leicester having all these qualities you can expect that the yarn will have a softness and billowiness to it, as I discovered in West Yorkshire Spinners Bluefaced Leicester Aran Prints. This yarn is true to the nature of the breed. It has a soft yet durable ply that results in a well-defined yarn that gives good stitch definition. This particular yarn has a very versatile quality and can easily create an accessory such as a scarf or hat, item for home décor or a light sweater. I think that this can easily be a go to wool yarn, which fits the build for many projects.

There is some subtle qualities of various wools, and the subtle differences in this one is not something that you will regret.

Air Pockets…They make the Difference

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Rugby in the rain. We received about 8″ with this storm, completely welcomed after nearly 2 months of dry and warm weather.

ScannedImageThe other day, while standing in the long overdue rain, watching my son’s Rugby game, I was thinking about what makes my crochet hat and gloves warmer then my denim jeans. The answer is simple, but also kind of surprising; air. The more little pockets of air that are trapped next to the skin, the warmer you can stay.

The process used in twisting the yarn and creating little knots, creates little pockets that trap air. Depending on the yarn and stitch combination, different levels of warmth can be created; this is why lace can be warmer than expected. The more things are compressed and made tight and dense, does not necessarily create a warmer fabric as it can press the air out of the work.

This is true with the yarn as well. Often it is realized that wool is warmer then bamboo, this is because of the fibers that are used. Bamboo, even though it is a plant fiber, is processed and extruded in factories creating a long smooth yarn that absorbs moisture, and thus in hot weather will keep you cooler by wicking away perspiration and allowing it to be evaporated. While the animal fibers that are utilized in wool yarns, are created naturally to keep the animal warm and dry. This is done by the crimp of the fiber itself.

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2 locks of wool, notice the crimp of the fiber

Wool fibers are not like hair, they are crimped (like the fashion in hairstyles from the 1980’s), it has stretch (like elastic) and it grows in clusters (a patch grows together and can be plucked out together as one group). This nature helps to create air pockets in the yarn that is being created (depending on the process used, more or less air can be trapped).

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My single crochet ribbed hat over my denim pants

So while my woven denim might be durable it does not offer as much warmth because the amount of trapped air is limited. But that hat, made only out of single crochet ribbing and my gloves made from back loop single crochet kept me quite toasty in comparison.