Sandpaper - is abrasive,created on a fabric, paper or other basis coated abrasive powder layer. Use sandpaper or emery paper for hand or machine processing of various surfaces to prepare them for priming, painting, sanding or removing old paint. Typically, this material is sold in rolls, but today tools designed and others using this material, eg emery sponge.
Grit - one of the most important characteristicssandpaper. It displays the number of abrasive particles per inch of material. Therefore, the smaller the grain size index, the more coarse sandpaper. The modern market offers products sandpaper grit 12-4000.
Grit 12-16 means that very nazhdachkarough. Most often it is used to remove the old floor varnish or lacquer. Indicator 24-40 also reports that the sandpaper is rough, it is used to remove paint from wooden surfaces.
For coarse grinding after paint stripperusing paper of 60-80 grain. A sandpaper 80-150 is more gentle. It is used after the rough polishing for smoothing and leveling the surface of the wood. it is also used for intermediate grinding, removal of various deficiencies including marks. Grit sandpaper so called average.
Fine grit sandpaper has 150-180. It performs the final sanding wood surfaces prior to painting and priming. Material grit 200-240 is very thin. emery paper These rooms are used for intermediate sanding after the primer before painting.
Granularity Extra fine sandpaperIt is 240-320. Using such paper is typically performed final sanding wood before painting. Thanks to her, you can gently remove traces of dust that may occur after the painting surface.
Super fine sandpaper hasgrit 360-4000. With it held the final sanding painted wood. It allows you to get rid of unnecessary gloss glossy surface, as well as the smallest scratches and stains.
Classification of sandpaper
Most often classified by sandpapertype bases. Let's look at features nazhdachki on paper. Sandpaper with a high density is able to withstand high mechanical stress. Moreover the substrate may be any conventional water resistant.
The advantages of this material includea small cost. Moreover, the paper base does not extend its shape, and on its surface even the tiniest fraction of the abrasive may be applied. If we talk about the shortcomings, the strength and durability is poor.
As in the fabric base sandpaperIt may be used cotton or polyester. Fabrics are impregnated with a special resin that allows you to give them extra strength and moisture resistance. The main features include a fabric base elasticity and tensile strength.
Sandpaper can have a combined basis thatCan not get through bonding fabric and paper. The stores can be found in the fiber-based material. But this applies to fiber discs, which are used in emery machine and allow to process especially hard surfaces.
The abrasive can be applied in different ways
Sandpaper can have semi-open and open Coating, besides Coating is closed and solid.
Products with a semi-open and open-Coatingcharacterized by the fact that about half of the substrate surface is coated with abrasive grains. With this paper are processed relatively soft and friable material, which include some of the timbers. Due to the special surface structure thereon lumps are formed, which eliminates clogging of the gaps between the grains of grinding wastes.
Sandpaper with a solid or closed Coating is based, completely covered with abrasive grains. This material is optimal for a solid surface.
Having dealt with the kinds of sandpaper, you can see what kind of material can be used for many purposes.