Packtech
A 25 kg bag of onions travels in about 24 grams of leno mesh: less than a tenth of a percent of what it carries.
— g
Both layers of the cut length at the fabric weight
The bag is cut from flat tubular fabric, so each bag is two layers of the flat width over the cut length; the cut length is the finished length plus the top hem and the bottom seam. Fabric weight is per square metre of one layer, from the roll label or a weighed sample. Labels, drawstring mass and sewing thread are not added to the bag mass. Bags per roll count whole cut lengths. **Mesh size and bag strength for the produce are the specification's; this tool only weighs and counts.**
Leno Mesh Bag: Cut Length, Bag Mass, Bags per Roll & Packaging per Tonne of Produce — free, with the formula and a worked example, at Textile School.