Explain the number behind the abrasive sheets

http://en.wikipedia.org/wiki/Sandpaper

To understand the number behind abrasive sheets, we need to look at the concept of grit size. The number on abrasive sheets represents the grit size of the abrasives it contains.

Grit size refers to the size of the abrasive particles on the sheet. It is a measure of how coarse or fine the abrasives are. The higher the number, the finer the grit.

The grit size is typically indicated using a grading system called the CAMI (Coated Abrasives Manufacturers Institute) or ANSI (American National Standards Institute) standards. These systems assign a number to represent the grit size.

For example, a sheet labeled as 80 grit will have larger and coarser abrasive particles compared to a sheet labeled as 220 grit. The 80 grit sheet is suitable for rough sanding and removing material quickly, while the 220 grit sheet is finer and better suited for finishing and smoothing surfaces.

Knowing the number behind the abrasive sheets helps you choose the appropriate grit size for the task at hand, whether it's heavy material removal or fine finishing. It's important to choose the right grit size to achieve the desired outcome and avoid damaging the surface you are working on.

Next time you're looking for abrasive sheets, pay attention to the number on the packaging to select the appropriate grit size for your project.