There is a preferred method for finding out thread consumption for garb products. In that formula, you will get multiplying elements in accordance to desktop kind and sew class. To decide thread consumption you simply want to multiply seam size with these factors. This way one can estimate the complete thread requirement for making a garment.
Actual thread consumption for a unit size of seam relies upon on the following factors.
Stitch Classes
Stitches per inches (SPI)
The thickness of the seam (fabric thickness)
Thread tension
Thread be counted (thickness of stitching thread)
So you are cautioned to calculate garment thread consumption by way of your own. You can boost a multiplying element in accordance to your product classes and requirement the use of the following steps.
Step 1: To calculate thread ratio, you want a stitching machine, material and stitching thread that will be used for bulk production. For cloth and thread, you can take comparable thickness and identical thread rely in case proper is now not available.
Step 2: Sew a seam of 12 cms lengthy and take 10 cms seam out of it via trimming 1 cm from each edges.
Step 3: Unravel each needle thread and bobbin thread from the seam. Remove crimp from the unraveled thread and measure its size in cm. Generally, it will be greater than the seam length. Now discover the multiplying issue via dividing thread size with seam length. Assume unravelled needle thread size is 12.5 cm then needle thread multiplying component is 12.5/10 or 1.25.
Using this technique you can locate out any kinds of machines’ thread consumption factors.
Step 4: Once you have consumption elements then it is convenient to calculate complete thread consumption. Measure the seam size of all operations of the garment and get thread requirement with the aid of multiplying thread consumption factor. Add thread wastage 5% for the thread that trims out from every quit of the seam.
For speedy reference, you can comply with the following thread consumption ratios. Source: Coats thread consumption guide.
Thread consumption ratio
If you choose to refer ready-made thread consumption elements then refer to Coats and A&E's Technical bulletins.