How do YOU repair a bullseye

[desertstars]

That means write down every step separately so we can understand exactly what's happening. I'm sure it's a simple fix!


Yessss

[magicogar]

This is a new practice glass I'm practicing it indoors btw. I was going to bring the glass outside someday and practice out there.


Ok, here's what i did:

1. Observed the bullseye and cleaned out the pit area with a scribe. Spray the area with compressed air to clean out the debree.

2. Put the base and injector on top of the bullseye. I was careful not to apply too much pressure. Only 1/4 to 1/2 turn after the injector touches the glass.

3. Add about 5 drops resin and apply the pressure cycle.

4. The resin flows to most of the areas except for the edges. So I use the vacuum cycle and pressure cycle a couple of times. I also use the scribe to give a little pressure on the edges.

5. The edges and some part of the sides still has air in it, so I use the lighter trick to expand the glass and push the air out. I heated the back of the glass very lightly, not enough to burn my hands when touched and use the vacuum cycle.

6. Then I set it back to pressure cycle right after the vacuum cycle and let the resin flow back into the bullseye while the glass is cooling. I didn't use that much pressure on the pressure cycle at all.

7. Then I cured it, both under and not under pressure.

Hope this is detailed enough.

The repaired went great. The only thing is this halo around the bullseye. This only happened when I used heat or when I cured under pressure. I will try to dump the heat entirely though.

If you need more details, let me know. I may left out something as I'm in a hurry to go to Easter Vigil.

Thanks!!

[cure4glass]

magicogar
Without being there, I'd suggest take away the heat and add a little patience, increasing the pressure/ vacuum cycles.I think the heat could be causing the halo(especially if it's a daisy-like halo)-jmo, Greg

[glassdoctor]

If you use heat again, let it cool back down completely (during vacuum) before going to the pressure again....

[magicogar]

Thanks guys!! I'll try all the ideas tomorrow. It's getting late.

[StarQuest]

Magicogar,

On your next bullseye after your last vaccum cycle try doing this after you go to pressure again.

Slowly back off your injector stem pressure until you start to notice a wee bit of resin leakage around the seal. Make sure your wearing safety glasses too just in case you cause a blow out. This will insure your not pinching the bullseye which sometimes prevents resin from filling the ring.

Also get rid of the bic lighter and stop heating the glass from the inside.
I'm not sure who ever started that one but I doubt you'll ever see that in any current training classes. If you really need to heat up a repair during vaccum invest in a $50 heat pen that has a hot air tip attachment. With this you'll never overheat the glass and it's small enough so you can blow hot air around the stem on the outside.

Good luck on your next fill. Let us know how things turn out

[gold star wsr]

Try using vacuum instead of pressure for your first cycle, and leave it on vacuum longer than what you think might be necessary ... 3 to 5 minutes. Pressure first forces the air that is in the void out to the edges of the void where it is trapped by the resin, but using vacuum first actually creates a vacuum in the void so that when you switch to pressure, the resin is literally sucked in. I employ this principal in all my repairs.

[magicogar]

gold star wsr,

I'm not sure exactly how this can be done. I'm using the Delta kits btw. How do you go about doing a vacuum first? Do you leave the spring loaded thingie down and just screw it into the injector, then pull to create a vacuum?

I did a couple bullseye practice repair today and I got rid of the heat. I cured under pressure again for testing and the halo appeared again.

StarQuest,

I tried that technique also and unscrewing the injector until there's a little leakage. But the halo's still there. I'm going to try unscrewing the spring loading thingie slightly to reduce pressure and then cure it.

I'm not giving up on this. Momma said never to quit at what you're doing. That's why I'm smoking for the last 15 years.

j/k...i don't smoke

[glassdoctor]

Magic, have you tried NOT pressure curing?

Work the bullseye until you are satisfied with it... and remove the bridge and cure. Just curious to see if that's any different for you...

[magicogar]

glassdoctor,

I tried that, and somehow when I remove the bridge, the air went back into the bullseye as if the resin leaked out when I remove the bridge. I'll keep on testing and let you guys know what's up. If anybody have any suggestions, please post.

Thanks!!