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- If the billet is soaking up resin, it is a good idea to surface impregnate it.
- Hook up the vacuum hose to the impregnation stand (Fig. 4).
- Place the billet under the bell jar (Fig. 4).
- Check the vacuum oil level. Refill if it starts to run low.
- Turn on vacuum pump by turning on the power strip connected to the wall (Fig. 4).
Figure 4
6. Close the valve on the upper right side of the Logitech VS2 (Fig. 5) and make sure the valve on the impregnation stand is open (parallel with the vacuum hose) (Fig. 4).
Vacuum Gauge Vacuum Valve 
Figure 
Figure 5
- Watch the gauge on the left side; it should be in the green around 25 in/Hg.
- Press on the bell jar to get a good seal.
7. Let the vacuum run for about one minute. Watch the billet while it is running.
- If the resin on the billet is bubbling it means it is soaking in.
8. Open the vacuum valve slowly. The bubbles should dissipate.
- Add more resin on the billet if there are bare spots.
9. Repeat steps 6, 7 and 8.
- There should be fewer bubbles.
10. Repeat step 6 and only let it run for about 30 seconds, and then shut the valve on the impregnation stand (perpendicular with the vacuum hose). Then open the vacuum valve. After the vacuum is fully released open the valve on the impregnation stand quickly.
- This will force the resin into the billet.
11. Repeat step 10 until there are only a few bubbles left.
12. Remove billet from the impregnation stand and turn off the vacuum pump.
13. After the billet is surface impregnated it can be immediately bonded to a frosted slide.
BONDING
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FROSTED SLIDES TO THE BILLETS
- Make sure the frosted slides are clean.
- Hold the frosted side up to the sample to measure how large it is. Draw two horizontal lines with resin to outline the size of the sample (Fig. 6).
Figure 6
3. Fill in the space between the two lines with resin.
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Put more resin on the right side.
4. Place the slide with resin side down onto the sample from left to right (Fig. 7).
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Lay down very slowly to prevent making bubbles.
Figure 7
5. Press on the middle of the slide moving any bubbles out to the sides (Fig. 8).
Figure 8
a. If there are lots of bubbles take off the slide. Wipe off the resin and clean the sample off with isopropyl alcohol then start over again.
6. Put the sample on the hot plate under the jig with the slide up and place a Teflon puck on top.
Lower the rod very gently down (Fig. 9).
a. Squeeze the spring and remove the Teflon puck to begin lowering.
Figure 9
7. Let the resin cure for about one hour.
a. Poke the resin with the metal point tool to make sure it is no longer sticky.
8. Write down the thickness of the frosted slide on the sample tray.
9. When cured remove sample and replace Teflon pucks.
GRAIN MOUNTS
- Dry the grains on the hot plate for an hour or more in a weighing dish.
- Mix up EpoTek resin.
- Place dry grains into a clean plastic mold and cover them with resin.
- It is best to use a small mold and to fill it at least half way.
- Label the mold with the sample number.
- Place the mold on the hot plate on top of a Teflon puck.
- Let it cure until it is hard all the way through-it may take the whole day.
- Peel away the mold and make sure to label the sample.
- Once the resin is dry the grain mount can be treated as a hard rock billet.
- When flattening the grain mount it is best to do it by hand. Make sure enough material is taken off so the grains are cut in half.
- When bonding the grain mount to a slide treat it as a hard rock.
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- Impregnation should be done on samples that are soft, water soluble or vesicular billets (ex. pumas, sandstone, mudstone, and clay stone).
- These samples should all be dried first. Refer to the Freeze Drier user guide.
- Once the samples are dry mix up 3 pumps of both part A and B of EpoTek resin.
- Place the billet into a clean plastic mold that is best fit it.
- Label the mold with the sample number.
- Cover the billet with resin (Fig. 10).
Figure 10
6. Hook up the vacuum hose to the impregnation stand (Fig. 4).
7. Place the mold with the billet under the bell jar (Fig. 11). Valve on ImpregnationStandMold with the Billet 
Figure 11
8. Check the vacuum oil level. Refill if it starts to run low.
9. Turn on vacuum pump by turning on the power strip connected to the wall (Fig. 4).
10. Close the valve on the upper right side of the Logitech VS2 (Fig. 5) and make sure the valve on the impregnation stand is open (parallel with the vacuum hose) (Fig. 11).
- Watch the gauge on the left side; it should be in the green around 25 in/Hg.
- Press on the bell jar to get a good seal.
11. Let the vacuum run for about one minute. Watch the billet while it is running.
- If the resin on the billet is bubbling it means it is soaking in.
12. Open the vacuum valve slowly. The bubbles should dissipate.
- Add more resin on the billet if there are bare spots.
13. Repeat steps 9, 10 and 11.
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There should be fewer bubbles.
14. Repeat step 9 and only let it run for about 30 seconds, and then shut the valve on the impregnation stand (perpendicular with the vacuum hose). Then open the vacuum valve. After the vacuum is fully released open the valve on the impregnation stand quickly.
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This will force the resin into the billet.
15. Repeat step 13 until there are only a few bubbles left.
16. Remove the mold from the impregnation stand and turn off the vacuum pump.
17. Place the mold on the hot plate on top of a Teflon puck.
18. Let it cure until it is hard all the way through-it may take the whole day.
19. Peel away the mold and make sure to label the sample.
20. Remove any excess resin with the rock saw or the band sander.
21. When flattening the impregnated billet it is best to do it by hand. Make sure that all the resin is removed from the bottom so the billet is showing.
22. Treat the impregnated billet as a hard rock when bonding it to a slide.