Tiles
Forstner bits, flat-bottomed to drill holes in wood materials, they can cut on the edge of a block of wood, and can cut overlapping holes; for such applications they are normally used in drill presses or lathes rather than in hand-held electric drills. Because of the flat bottom of the hole, they are useful for drilling through veneer already glued to add an inlay.
The bit includes a center point which guides it throughout the cut (and incidentally spoils the otherwise flat bottom of the hole). The cylindrical cutter around the perimeter shears the wood fibers at the edge of the bore, and also helps guide the bit into the material more precisely.
Forstner bits have radial cutting edges to plane off the material at the bottom of the hole. The bits shown in the images have two radial edges; other designs may have more. Forstner bits have no mechanism to clear chips from the hole, and therefore must be pulled out periodically.
Forstner Bits,bosch forstner bits,colt forstner bits Behappy Crafts (suzhou)Co.,Ltd , https://www.behappyindustry.com
1. First, clean the back of the pre-selected tiles and soak them for more than 2 hours. The purpose of soaking water is to let the tiles absorb moisture in advance , so as to avoid the moisture in the adhesive material after the plastering, affect the adhesive strength or cause excessive shrinkage of the adhesive material to cause hollowing, de-bonding, and the like. After the tile is immersed in water, it should be taken out from the water before being applied, and the surface moisture can be wiped off with a cotton cloth or the surface moisture can be dried before paving. 
2. Before the paving begins, a vertical line should be hung on the wall leveling layer to determine the wall size line of the tile and pull the horizontal line so that the surface can be flat and the tile can be horizontally and vertically.
3. When laying tiles, use a horizontal line as a basis, and set a wooden pallet that supports the tiles. The purpose is to prevent the tiles from falling or displacing before the bonding material has hardened to build strength. 
4. The tiles are usually started from the outside corner or from the edge of the door and window, and they are arranged from bottom to top and from left to right. The method of paving is to wet the screed with water, apply the spliced ​​material to the back of the tile with a small trowel, and then apply the tile to the wall and tap it with a spade with a wooden handle or a rubber hoe. Tiles, so that the adhesive material is full of gaps between the tiles and the wall, pay attention to the top of the tile. The mouth should be aligned with the horizontal line. If it is uneven, you can adjust it by placing a small piece of wood under the tile. After sticking in a row, you should use a ruler to cross it, level it up, knock out the tile that is higher, and remove the paste from the recessed tile.
Bonding materials should not be too thick, otherwise it is not easy to spread, but also should not be too thin, otherwise tile paste can not be fixed, easy to fall down. 
5. According to the entire glazed brick wall contamination, scrub the surface with 10% dilute hydrochloric acid solution or tap water. If you use a diluted hydrochloric acid solution, rinse it thoroughly with tap water.
6. When paving the tiles, the excess adhesive material in the tile joint should be promptly wiped clean, and the stains on the tile should be wiped off with wet cotton cloth. Do not wait until the adhesive material is hard and then wipe the cleaning. Clean, if scratched with a hard object will damage the glaze. After the adhesive material is solidified, the joint can be brushed with white cement, gypsum plaster or color paste, and the mortar can be evenly wiped and filled with cotton yarn. 
Tiles, these 6 processes need attention
With regard to the purchase and paving of ceramic tiles, we have talked about enough. Today, Xiaobian wants to share with you all the six major techniques that need attention in ceramic tiles.