Forums
New posts
Search forums
What's new
New posts
Latest activity
Members
Registered members
Current visitors
Charts
Log in
Register
What's new
Search
Search
Search titles only
By:
New posts
Search forums
Menu
Log in
Register
Install the app
Install
Gemstones, Minerals & Fossils
Lapidary
Cutting saphire
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Reply to thread
Help Support Prospecting Australia:
This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others.
Message
<blockquote data-quote="Moth" data-source="post: 570650" data-attributes="member: 9882"><p>I'm with the others - the most usual cause of scratching is contamination and that can occur from an external source (Swarf, failing to clean the stone from the previous lap, contamination on the polishing lap, or a build up of too much excess polish combined with a 'heavy hand').</p><p>Suggest a final cut at 1200, a pre-polish at 8000 and a final polish at 50,000 or 100,000 - not charging your polishing laps with too much material(making sure it is reasonably evenly spread on the lap) and ensuring you clean your hands then clean the stone at each sequence. Work at lowest speed when polishing.</p><p></p><p>Best of luck.</p></blockquote><p></p>
[QUOTE="Moth, post: 570650, member: 9882"] I'm with the others - the most usual cause of scratching is contamination and that can occur from an external source (Swarf, failing to clean the stone from the previous lap, contamination on the polishing lap, or a build up of too much excess polish combined with a 'heavy hand'). Suggest a final cut at 1200, a pre-polish at 8000 and a final polish at 50,000 or 100,000 - not charging your polishing laps with too much material(making sure it is reasonably evenly spread on the lap) and ensuring you clean your hands then clean the stone at each sequence. Work at lowest speed when polishing. Best of luck. [/QUOTE]
Verification
Post reply
Gemstones, Minerals & Fossils
Lapidary
Cutting saphire
Top