![]() ![]() ![]() The benefit of having a grid ruler is that you can use the full width of the ruler to mark in wider seam allowances and hem allowances.You can then use your ruler to make small dashed guidelines along the curve of the armhole and necklines.So the seam allowance marked here is 1cm, but this will change depending on how you intend to finish your seams. For the sake of the diagrams I am using a ruler with thick black lines at each cm marking (thin black lines every 2mm). Along straight lines of stitching you can use the grid ruler to mark parallel lines at your desired width of seam allowance.The images above show examples of grading rulers and french curves, though of course they come in many varieties and you are best to test out which type works best for you.īelow are some basic diagrams and instructions for using these tools to mark the seam allowance on your patterns: This provides an accurate guide for filling in the rest of the curve with a french curve ruler. They are also ideal tools for grading patterns, hence they are often referred to as grading rulers.Įven around curves you can line up the grid of the ruler correct to the mm and make a small line marking, pivoting your ruler along the curve to create a dashed line. Clear grid rulers, such as the one pictured, are great for marking seam allowance on straight edges where you can get a completely parallel line. ![]() The best rulers for pattern making are made of strong clear plastic and have a grid across the whole ruler making it easy to accurately mark seam allowance. No self respecting pattern maker likes to be without an accurate ruler. ![]()
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