The knitter you are certainly has already faced this problem: choose another wool than the wool recommended in a pattern. How to substitute the suggested wool and how much to buy ..? Here are some tips to help you see things more clearly.
Here is the information that interests us about the original pattern:
SIZES: S (M, L, XL)
YARN: Grace Silk & Wool Wool (50% merino wool, 50% silk); 100m / 50g): 11 (13,14,15) skeins
GAUGE: 20 sts = 10 cm in Stockinette on 5 mm needles.
Lets say we want to knit the average size (M) of the example below.
Step 1 : Choose the wool
• The sample indicated on the label must be equal to the sample required for the pattern (or plus or minus 1 stitch)
• Normally, this wool should also have a similar measurement to the recommended wool (100 meters for 50g or 200 meters for 100g, do not forget to consider the weight of balls of wool to compare apples with apples !!)
If we look at the Gobelin label, we see that the sample corresponds to the chosen project. At the level of the footage, the goblin contains 160 meters per 100g ... so it is a little thicker than the original wool because equal weight (100 g) the original wool contains 200 meters while the Gobelin has 160 (or 40 meters of less). Using Goblin, the result will be slightly heavier and stronger than with the original wool
Step 2 : The required quantity
It is always wiser to refer to the required footage rather than the weight of the wool. The original pattern tells us that we need 13 skeins of 100 meters to achieve the pattern, or 1300 meters in total. Now, let's take out our calculator !! The number of total footage must be divided by the amount of footage contained in the selected wool. Here is the calculation: 1300 meters ÷ 160 = 8.12 skeins of Goblin. The amount needed to knit the average size is 9 skeins (8 may be enough since the original pattern certainly did not knit the last ball until the end ... but it is more prudent to take the 9th)
You will find a practical table on the different sizes of wool on the site Yarn Standards, the French translation is find HERE.
Finally, do not forget to consider fiber as such. The original wool in our example is a mixture of merino and silk, this strand has properties that are specific to it (shine and suppleness of the silk, softness and elasticity of the merino).
We must choose a substitute that corresponds to the same qualities if we want to obtain a result similar to the original model. For socks, it is imperative to choose a yarn that contains a little nylon and Wool such as Biscotte Bis-Sock. Nylon will make the socks more durable at the heels, soles and toes.