Poplin vs Broadcloth by definition
Poplin is a strong fabric in a plain weave of any fiber or blend, with crosswise ribs that typically gives a corded surface.
Poplin traditionally consisted of a silk warp with a weft of worsted yarn. As the weft is in the form of a stout cord the fabric has a ridged structure, like rep, which gave depth and softness to the lustre of the silky surface. It is now made with wool, cotton, silk, rayon, or any mixture of these, though originally made from silk. The ribs run across the fabric from selvage to selvage. Poplins are used for dress purposes, and for rich upholstery work. They are formed by using coarse filling yarns in a plain weave. Shirts made from this material are easy to iron and do not wrinkle easily.
Broadcloth, on the otherhand, is a dense woolen cloth. Modern broadcloth can be composed of cotton, silk, or polyester, but traditionally broadcloth was made solely of wool. The dense weave lends sturdiness to the material.
Difference between Poplin and Broadcloth
Poplin is lightweight fabric with a fine smooth weave and texture with a certain crispness. Broadcloth would have a somewhat coarser texture and softer feel and may be a bit thicker.
Broadcloth, a fabric whose weave is very similar to poplin except more densely packed, is one of the most formal shirting for day-to-day wear. End-on-end broadcloth is that made by interweaving threads of alternating colors for a visual texture so subtle it appears solid from an arm’s length away. Thanks to its tight weave, this cloth displays patterns with exquisite precision.