Sandpaper is also referred to as sandpaper. This abrasive material of various grain sizes is on a fabric or paper basis, on which a layer of special abrasive powder is applied . Emery paper is used both in the “manual” mode and in the machine mode for processing (cleaning) all kinds of surfaces, which are subsequently primed, sanded, painted, varnished, etc. Using sandpaper, you can also remove old paint, rust. Most often, such sanding pads are produced in rolls, but there are more modern options, for example, an emery sponge. To clean large enough areas, it is good to have a special cork bar on which emery is attached. If it is necessary to clean the metal, then you can not do without a drill, which will serve as a drive for a rotating disk grinding wheel and abrasive brushes
to.
If you need sandpaper for various purposes, its classification will help you choose the one that suits you best. So, emery is classified according to the type of base. Paper-based skins can be either conventional or waterproof. In addition, this material can withstand considerable mechanical stress. Its price is low, but it is not very durable and quickly erased. Fabric-based sandpaper (polyester or cotton) is more durable, flexible and resistant to moisture. There are also sanding skins on a combined basis obtained by gluing fabrics and paper. Particularly hard materials are processed on special emery machines, fiber-based abrasive disks.
However, knowing the classification is not enough; you need to acquire it also taking into account
graininess. It is she who is the most important characteristic of this material. The coarser the sandpaper, the lower its graininess. Indicators of the coarsest sandpaper range from 12 to 16. With its help, old paint is usually removed from the surfaces, varnishing, and drying oil is cleaned.
Behind her is a less coarse emery, the grain size of which ranges from 24 to 40. She can also clean the paint. But the abrasive skin 60-80 is used after the surface is cleaned. Such sandpaper carry out rough grinding. To smooth and level the surface, sandpaper with a grain size of 80-150 is used. It also removes the remaining defects after rough grinding, irregularities.
Sanding belts for finer work have a grain size of 150 to 320. They treat the surface at the final stage, immediately before and after the primer, before painting. After grinding with such fine-grained emery, the wooden surface becomes perfectly smooth. Perhaps it does not even need to be painted, but rather simply varnished.
However, there is a super thin emery. Its indicator ranges from 360 to 4000. This is sandpaper nulevka, the most "delicate", and is most often used to sand an already painted surface. Using such a skin, you can eliminate unnecessary glossy gloss of paint, smooth out the smallest scratches, remove accidentally planted spots.