3M 5 m P120 "Bare Surfaces" Medium Grit Sandblaster Sandpaper Abrasive Roll - Gold

Product Information

The micro grit types of sandpaper grit are classified as follows and are primarily used for small, precise sanding, like taking off coats of finish or smoothing small areas of buildup. The paper has a high resistance to loading and curling, offering a uniform finish across the workpiece. Smirdex Wet and Dry Paper; perfect results This sits below coarse sandpaper and includes 24 and 36 grit sandpaper. It is used for jobs that have a lot of paint or varnish to remove. It's often used on rough timber that needs to be smoothed out and the first sanding when sanding floorboards. What does the P mean in sandpaper grits?

As you’ve already notices, we opted for the “P” grade system since that is largely what we use in our projects. It’s also the international standard for denoting the coarseness of an abrasive. The Coarser Abrasive Grades PaintWell increased its Industrial Paints offering with the acquisition of Promain UK Limited, the preferred UK distributor for many of the world’s leading paint and surface coatings manufacturers. Starting with the wrong sandpaper grit can add hours to your woodworking project. A grit that is too coarse may remove more material than desired and ruin the wood. And using a sanding grade that is too fine will burn time that you can’t afford to lose. But now, those days are over—provided you see our guide sooner than later. We grabbed every piece of sandpaper from our tool bag (except P150, sorry P150) and scribbled down the most common uses for each one. Since every grit level serves a specific purpose in our workshop, we want to share that information so you can avoid wasting time (& money) on the wrong sandpaper. Grits above 320 such as 400 to 600 are typically used to get a really fine finish on wood ready for waxing or polishing. It can also be used to smooth out a top coat and fine wet sanding.P120 Sandpaper– Any wood that was too soft for P80 will start the latter at P120. We generally use this grit when first smoothing pine, redwood, & cedar. Lastly, enamel paints and polyurethane don’t require the wood to be sanded beyond P120. The only exception would be a clear satin finish, in which case you may want to eliminate any scratches left on the wood with P150 or P180. This highly coarse sandpaper grit ensures expedited removal of all kinds of material. Because of the roughness, extra coarse sandpaper is used for the initial round of sanding on hardwood flooring. As per the FEPA standards, the sandpaper grit sizing is denoted by P30, P36, P12, and P16, while the CAMI standards denote the classes as 24, 30, or 36. The average diameter of the sandpaper grit particles can range anywhere between 530 to 1815 micrometers. Coarse Despite the identical name to the abrasive paper category listed above, very fine micro grits are distinct and are used for sanding finishes in between consecutive coats on either wood or drywall. FEPA classifications are P240, P280, P320, or P360 while CAMI classifications are denoted as 240. The diameter size is between 40.5 to 58.5 micrometers. Extra Fine Grit Levels P40 & P60– Most projects won’t need these sandpaper grades. They’re only required for cleaning up rough lumber, evening out large bumps in the wood, & removing stubborn old paints. Essentially, you’ll use these to soften anything that’s too rough for your hands to handle. Also, they can remove almost anything so don’t hesitate to jump up to the next grit. In the event that you don’t have every sheet listed on our sandpaper grit chart, that’s not the end of the world. You can substitute a similar grit level depending on the application. Just be sure to do further research to make sure that you don’t select the wrong one. That is, some substitutions are less intuitive than others. For instance, a craftsman looking to stain a wood piece might view P240 as a suitable replacement for P220. However, the better option is actually P180 as it gives the wood grain a stronger appearance. Also, it’s worth mentioning that P240 is a bit too fine for wood stain and will hinder it ability to soak into the wood. Applications for Each Grit Level

These types of sandpaper grit classes ensure rapid material removal. As per FEPA standards, these are classified as P40 or P50 and are denoted as 40, 50, or 60 by CAMI standards. The typical diameter of the sandpaper grit ranges between 336 to 425 micrometers. This sandpaper allows you to clear away a layer of finish or debris with little effort. However, it may not leave behind the smoothest surface texture. MediumIt is also the common choice when sanding painted walls, smoothing out plaster and rubbing down filler to blend in with the surface it's on. Super fine micro grade paper is ideal to sand the final layer of finish on wood. It is just strong enough to thin patches and small inconsistencies in the layer's application, but not rough enough to actually remove anything that would want to be kept. FEPA classifies them as P800, P1000, or P1200 while CAMI classifies them as 400, 500, or 600, and average diameter sizes range from 15.3 to 23.0 micrometers. Ultra Fine

P400 Sandpaper– Only oil finishes like tung oil & teak oil require the surface to be finished to this level. And it’s also not a requirement for all wood working projects that use those types of finishes. Lastly, you can rely on P400 to smooth the top coats of polyurethane. Smirdex is a leading company in the field of manufacturing premium quality abrasives for a wide range of applications. With a key focus on high quality standards achieved through the use of top quality raw materials, certified production processes, and the development of innovation via specialised research, Smirdex produce quality products used in a multitude of industries across the globe. At a glance P220 Sandpaper– For novice woodworkers, it’s time that we tell you that you have to sand with multiple grits. And P220 is generally the go-to 2nd & 3rd level abrasive for prepping wood for oil finishes. But in the case that you’re applying a wood stain, your destination does stop here. Finishing Sandpaper Grits

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The supreme quality of the micro grits is visible when sanding varnished surfaces, where the quality and roughness of the treated surface has great uniformity.