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A rotary machine known as a multi disc sander or buffer is then used for the final sanding steps. The buffers take abrasive discs, which rotate in same plain is the floor itself. The power of the stripping relies on the weight of the machine and therefore can be useful for surface treatments like buffing, light sanding or stripping old sealants.
The need for a protective polymer arose due to the data layer on Blu-ray discs being much closer to the surface of the disc than in other disc formats, such as HD DVD. One of its principal applications at first was for scratch resistance in Blu-ray and other optical discs .
Baby scratch - The simplest scratch form, it is performed with the scratching hand only, moving the record back and forth in continuous movements while the crossfader is in the open position. Scribble scratch - The scribble scratch is by rapidly pushing the record back and forth.
The conical plate centrifuge is used to remove solids (usually impurities) from liquids or to separate two liquid phases from each other by means of an enormously high centrifugal force. The denser solids or liquids which are subjected to these forces move outwards towards the rotating bowl wall while the less dense fluids moves towards the centre.
Vinyl records are easily scratched and vinyl readily acquires a static charge, attracting dust that is difficult to remove completely. Dust and scratches cause audio clicks and pops and, in extreme cases, they can cause the needle (stylus) to skip over a series of grooves, or worse yet, cause the needle to skip backwards, creating an unintentional locked groove that repeats the same 1.8 ...
Disc rot is the tendency of CD, DVD, or other optical discs to become unreadable because of chemical deterioration. The causes include oxidation of the reflective layer, reactions with contaminants, ultra-violet light damage, and de-bonding of the adhesive used to adhere the layers of the disc together.
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