for a heavier interfacing, what is the material of the fabric? is it 40% nylon $60 percent cotton or something?
I believe all interfacing is a synthetic material. They are all completely washable and dry cleanable and shrinkage is not a problem. Check these sites for more information.
http://www.needlepointers.com/displaypage.aspx?ArticleID=32654&URL=http%3a%2f%2fwww.simplicity.com%2findex.cfm%3fpage%3dsection%2fsewtips%2finterface.htm
http://www.denverfabrics.com/pages/sewinginfo/simplicity-sewing-hints/sewing-interfacing.htm
To determine the material composition of a heavier interfacing, you can follow these steps:
1. Check the product label: Start by examining the product label attached to the interfacing. It usually provides information about the composition of the material. Look for terms such as "material composition," "fabric content," or "fiber content."
2. Look for specific percentages: The label may include the exact percentages of each fiber used in the interfacing. Look for numbers indicating the composition ratio. For example, it might state "40% nylon, 60% cotton" or "nylon: 40%, cotton: 60%."
3. Consult the manufacturer's website: If the label information is unclear or not available, you can visit the manufacturer's website. They often provide detailed product descriptions, including material compositions for various interfacing options. Look for a specific product page or search for a list of materials used in their products.
4. Contact customer support: If you are unable to find the required information through the label or manufacturer's website, consider reaching out to the manufacturer directly. They may have customer support services available to assist with inquiries regarding their products.
Remember, there are different types and brands of interfacing available, so each one may have its own specific material composition. It is essential to refer to the product label or manufacturer's information for accurate details.