abracadabra! where did the air go?

[StarQuest]

It's always been my understanding that air compresses while resin does not. So when you see that leg filling under pressure, what you have done is compressed the air making it look to have disapeared. As soon as you release pressure, compressed air will find its way out in the form of very small undetectible bubbles.

Basically that's why when your repairing a leg under pressure and your
left with a small tip, you know it's time to cycle back to vacuum. Need to let air out.

I think if you utilized a good magnifying glass from the inside you would see that process taking place. JMHO.

[ChipRite]

There are cases when you will not get the last drop of air out of a leg and a spot may be present when you release pressure, so you need to cure those under pressure. Moisture pushed into the end by resin also will not be vacuumed out of a tight sub surface leg in my experience.
Thick resin in cold weather on a cold screen will fill very slowly and hinder the air from being pulled back under vacuum, as will prematurely cured resin that has started thickening.
Try to open up the legs that are sub surface, by carefully flexing with a probe or heat. This then opens a path for the air to escape. Worst case, drill and pop the end of a leg.

[cazador]

I bougt an uv shield for my DeltaKit bridge , but when installed , I can not reach the leggs with my probe to make them flex, as suggested in the previous thread , so beware !
Some resin got on the uv shield and I tryed to remove it with denatured alcohol , but didn't work , any suggestion how to get the resin off, because the uv shield looks cloudy now .