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2. Porosity sealing - Wikipedia

   en.wikipedia.org/wiki/Porosity_sealing

   Powder metal is also impregnated to enhance maintainability. PM parts are generally difficult to machine and some compositions may not be machinable without ruining the cutting tool. Secondary machine operations, such as drilling, tapping, or cutting, are impaired as the voids between the particles cause tool chatter, reducing tool life and ...

3. Wood finishing - Wikipedia

   en.wikipedia.org/wiki/Wood_finishing

   Successful filling of voids in wood requires the filler to precisely match the colour and grain pattern of the wood around the void, which is difficult to achieve in practice. Furthermore, filled voids do not behave like wood during subsequent finishing steps, and they age differently to wood. Hence, repairs to wood using fillers may noticeable ...

4. Void (composites) - Wikipedia

   en.wikipedia.org/wiki/Void_(composites)

   Void content in composites is represented as a ratio, also called void ratio, where the volume of voids, solid material, and bulk volume are taken into account.Void ratio can be calculated by the formula below where e is the void ratio of the composite, V v is the volume of the voids, and V t is the volume of the bulk material.

5. Woodturning - Wikipedia

   en.wikipedia.org/wiki/Woodturning

   Voids in the wood require higher lathe speeds, fillers, or extra safety precautions. Although other woodworkers value tight, straight grain, woodturners often search out the unusual wood from roots, defects, or diseased portions of trees. The craft of woodturning is preserved and advanced by a community of practitioners.

6. Cyanoacrylate - Wikipedia

   en.wikipedia.org/wiki/Cyanoacrylate

   Cyanoacrylate glue is also used in combination with sawdust (from a saw or sanding) to fill voids and cracks. These repair methods are used on piano soundboards, wood instruments, and wood furniture. Cyanoacrylate glue is also used in the finishing of pen blanks (wooden blanks for turning pens) that have been turned on a lathe by applying ...

7. Porosity - Wikipedia

   en.wikipedia.org/wiki/Porosity

   Porosity or void fraction is a measure of the void (i.e. "empty") spaces in a material, and is a fraction of the volume of voids over the total volume, between 0 and 1, or as a percentage between 0% and 100%. Strictly speaking, some tests measure the "accessible void", the total amount of void space accessible from the surface (cf. closed-cell ...

8. Void ratio - Wikipedia

   en.wikipedia.org/wiki/Void_ratio

   where is the void ratio, is the porosity, V V is the volume of void-space (gases and liquids), V S is the volume of solids, and V T is the total (or bulk) volume. This figure is relevant in composites , in mining (particular with regard to the properties of tailings ), and in soil science .

9. Primer (paint) - Wikipedia

   en.wikipedia.org/wiki/Primer_(paint)

   Primer reduces the number of paint coats needed for good coverage and even color. A thin layer of paint may still be permeable to water. Water can permeate into the wood and cause warping, mildew, or dry rot. Primer improves the waterproofing of the finish. [4] Primers are not used as part of a wood stain treatment because they obscure the wood ...