Forums Polishing BA5T Polishing

8 replies, 6 voices Last updated by  gemmakermz 1 month ago
Viewing 9 posts - 1 through 9 (of 9 total)
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  • #2451

    andreysergeevichkornilov
    Participant
    @andreysergeevichkornilov

    Hello everybody!
    Today try my new lap BA5T and have problem whith this one.When lap is new(after lathe) he have ribred surface and when you polish you have polish lines on stone(not scratch or silk).So if somebody know how to remove it from lap please say.Sure cutters who try this lap should understand me.
    Thank you.

    #2452

    Jon Rolfe
    Participant
    @jonathan lrolfe

    All you have to do is sweep the lap. This is a good practice anyway because it also spreads the wear and gives the lap a longer life and prevents wearing a groove in a “Favorite” location.. As the lap breaks in, the lines eventually disappera, but still, develop the habit of sweeping, for any lap.

    #2460

    Wayne Emery
    Participant
    @Lightbender57

    Yep, I second that. Also, I suggest reducing the amount of polishing agent and the amount of lubricant and lowering the speed of the lap. Maybe even try polishing on a VERY slow speed or even stationary. You might be surprised. But sweep.

    #2471

    Gregory Hays
    Participant
    @gregoryhays

    I to agree the dryer the better and evenly sweep across the lap. As Jon explained to me when a heavy use of lubricants on a new batt lap the tool marks may and will transfer to the facet until your lap is broken in.
    Greg Hays
    San Marcos, CA

    #2476

    andreysergeevichkornilov
    Participant
    @andreysergeevichkornilov

    Thank everybody for answers,but i dont understand what you mean whith that word – sweep.I try on one side use sand paper to remove grooves,but after that side start scratching.Mayby seed from sand paper goes into the lap=(.Now i have 2 problems grooves on one side and scratchs/silk on another.I try use corundum to remove grooves/scratching but it do not helps.So please help me understand what you mean whith this word – sweep,because i understand it like clean.If somebody have photos/videos please post it!
    Thanks for everybody again.

    #2481

    wardmonterosso
    Participant
    @wardmonterosso

    Sweep = motion Andrey.

    W@rd

    #2484

    wardmonterosso
    Participant
    @wardmonterosso

    Sweeping is the act of moving your stone across the surface of your lap so as not to impress the possible surface imperfections into the face of the facet you are working on. It is a somewhat rapid motion, back and forth, in and out, front to back, all this relative to the location you are working upon your lap.

    W@rd

    #2491

    andreysergeevichkornilov
    Participant
    @andreysergeevichkornilov

    Stationary works good.Thanks everybody for answers.

    #5553

    gemmakermz
    Participant
    @gemmakermz

    heaven forbid—- never use any kind of sand paper on any kind of polishing lap— THE GRIT FROM SAND PAPER IT LOOSE AND WILL contaminate/EMBED IN YOUR POLISHING LAP. if you did do that you’ll have to have it turned in a lathe to be resurfaced. and YES their all correct keep the stone in motion across the surface of the lap but try not to go against the direction of the turning lap, you could catch a sharp point or edge and pop you stone off or gouge the surface of the lap. i use tin laps and have some very old crystalite tin ones and other old ones and did buy and are using 2 6″ batt laps which i was later told are 90% tin, they all work great, i’ve had 2 become contaminated by students but have a member of the lakeside gem and mineral club that works in a machine shop and had them turned/resurfaced and work great again.

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