Plate: As the name suggests, the material is made into a board, and then it is punched into a column from the top of the board, which is wool.
Bar: The material is poured into a tube, and it is a very soft stick. Cut into cylinders according to thickness requirements
Because the plate is punched into a column, like a circle on a white paper, there is a gap between the circle and the circle. This gap is a waste. Bars don't have this trouble. Even though he has the heads we said, it doesn't have too much material.
Therefore, from the point of view of the use of materials, it is more expensive.
According to the kilogram, the general plate is 2 dollars more expensive than the bar, but some processes must be made of plates or bars, and the prices of different technologies are not the same.
So the price should be based on the process!
As for distinguishing wool, the simplest is to look at their cuts.
The bar is cut out so his front and back look rougher than the side, not smoother than the side (this is not very obvious)
The plate is flushed out so his front and back are smooth and the sides are rough.
Of course, if you make a button, this method will not be visible. Then you will need a professional to look at it.
Want to learn more about buttons: accessible
For more details, please pay attention to WeChat public number: 
Mesh Embroidery Fabric,Embroidery Fabric,Rope Mesh Embroidery,Dribbling Embroidery Fabric
SHAOXING SKYRISE TEXTILE CO.,LTD , https://www.eurofashiontextile.com