Yes, DK weight (also called double knitting) is 8 ply yarn
Double Knitting (DK) is a yarn weight. You would have to have a 4 ply that is DK weight in order for it to come out the size you expect.
Double Knitting (DK) is a yarn weight. You would have to have a 4 ply that is DK weight in order for it to come out the size you expect.
In the UK, worsted weight yarn corresponds to 10ply (i.e. heavy DK or light aran yarn)
See http://www.YarnStandards.com for how the categories of yarn weights compare in terms of relative gauges and needle sizes used to achieve those gauges. Worsted weight (Category 4 - Medium) is the yarn commonly used to knit sweaters in the U.S. U.K. knitters often use a slightly thinner yarn called "DK" (double knitting), which falls into Category 3 - Light. Worsted weight yarn is typically knit at 20 sts/4 in or 10 cm on US 7/4.5mm needles, whereas DK weight yarn is typically knit at 22 sts/4 inches or 10 cm on US 5/3.75mm needles. Some countries still use the old 2-ply, 4-ply, 6-ply, 8-ply classification to describe yarns, where 4-ply is fingering weight, 6-ply is sport weight, 8-ply is DK, and 10-ply is worsted weight. One problem with that system of classification is that it assumes a standard ply weight. There are many yarns these days (particularly in the Bulky and Super Bulky categories 5 and 6) that are single-ply yarns which knit at various gauges on various needle sizes.
Yes. It isn't the number of plies that determine whether a yarn is called DK (double knitting weight), but the over all thickness of the yarn. Plus, you don't necessarily have to use DK yarn to double knit. Any two yarns of matching thickness can be used. You should check your pattern for the correct gauge and weight of yarn to make sure the finished garment will fit as expected.
dk means double knitting yarn.
"Double knit," refers to the weight or thickness of the yarn. Double knit is between sport weight and worsted weight. It is named for the knitting technique that most often calls for this weight: double knitting. Double knitting is the knitting of a two sided fabric that is reversable with a two color pattern on one side and the negative of that pattern on the reverse side. It is called double knitting because both sides are knit at the same time on one set of needles. "4 ply" refers to the number of individual strands twisted together to form a yarn. A yarn with two strands is called "2 ply," and so on. The number of plies determines, to a degree, the fluffiness or smoothness of a yarn. Yarn with more plies is generally smoother and less fluffy. The number of plies does not determine the weight or thickness of the yarn. It is possible to have a double knit yarn that is also 4-ply, or to have a thicker yarn that is has more or fewer plies. The same is true with a thinner yarn.
4ply is NOT a yarn weight. Many 4ply yarns in the US are worsted weight. DK is a lighter yarn weight.
No, Cascade 220 is worsted weight (a little heavier than DK).
DK stands for Double Knitting. You can find a comparison chart for yarns at Craft Yarn Council's web site. DK yarn (#3) is a little thinner than worsted weight (#4) which may or may not be important, depending on what you're making. When in doubt, make a gauge swatch with the yarn and hook you plan to use for your project.
In general, dk and worsted mean much the same thing. Dk is used in the UK and worsted in the US. However, there is a lot of variation between brands. The best idea is to check the length and weight information on the ball bands. I do find that US worsted weight patterns make up well in dk, but I always have lots left over! http://www.theknittingsite.com/knitting-conversion-tables/
Double knitting refers to the "weight" of the yarn--how 'thick' is the yarn. DK or double knit is a a light worsted weight yarn. DK typically makes 5-6 stockinette stitches per inch when knitting. For crochet, you would generally us an "I-sized" hook (4.5 to 5.5mm). Also, you would get approximately 3-4 single crochets to the inch, in gauge. Of course, adjusting your gauge to fit the pattern requirements--generally by changing the size of your hook, either larger or smaller.