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  • Optical Polishing Pitch
Apr 2011
Meller Optics Inc.Request Info
PROVIDENCE, R.I., April 13, 2011 — Meller Optics Inc. has released a full line of contaminant-free pitch for optical lapping, blocking and polishing.

Gugolz Polishing Pitch is ready to use simply by slicing the amount required, melting it and pouring it onto the lap, without the need for screening, filtering or mixing additives, according to the company. Made from all-natural wood resin rather than petroleum byproducts, the pitch comes in five grades — from very soft to very hard — with melting points from 52 to 87 °C. The grades are fully compatible to allow users to achieve their own grades of hardness.

The pitch helps prevent contamination of polishing media and substrates because of the wood resin, the company says.


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The process whereby blanks are attached to a block in a position for grinding or polishing.
1. The process of wearing down the surface of a softer material by rubbing it under pressure against the surface of a harder material that has been formed in the shape opposite to that desired on the softer material. Loose, wet abrasive generally is used between the two parts, but sometimes the abrasive is embedded in the lap in a rigid form (see diamond cutting tool). 2. See fiber lapping.
The optical process, following grinding, that puts a highly finished, smooth and apparently amorphous surface on a lens or a mirror.
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