Outline around repair?

[kingmonkey]

Originally Posted by GlassStarz

I use a IR temp thermometer I bought at radio shack when it gets near 70 I do the repair

I need to get one of those gadgets. With the fantastically cool Texas summers coming up how hot is too hot when doing a repair?

[maxryde]

Sounds like a pressure ring to me, daisy effect from pressure? Or not completely filled, or delamination? I agree with brent on the contamination issue as I find that contaminates are found in the bottom of breaks, not all the way around, on usually older damage. One other thought, has the chip been exposed to xphobic treatment (rain-x) or the like? There could be some left in the small of the break. Just a thought.

[jasonsresin]

there are some good points for you to consider. i think glass starz first point was right on the money. that flower effect is resin getting behind the first layer of glass. sometimes we cant help it as much, like a break that runs deep. that's a measurement we usually aren't concerned with. it's usually just how long is crack and how fat. a deep star that touches that center layer is much more likely to cause a flower. you can use all the pressure in the world but if the star only goes half way down the first layer, flowering is not going to be a factor. that's why sometimes we do something the same every time and whoops!, this one left a flower. drilling too deep of course will cause this effect also.

also pay mind if it is a chevy venture or a bmw, they leave a little ripple in the center that a trained eye can tell isn't going to come out with the crack. almost like a pre-flower (but not really). if it was a venture or a bmw, it wasn't your fault and isn't related to all the good points here.

[screenman]

I am wondering what the ripple is you are trying to describe, we are not talking about the heater elements I take it.
We must have different breaks over here as I am yet to see a starbreak that does not go back to the laminate. When glass breaks it predominatley breaks cone shaped, meaning there will be a smaller impact point than the overall damaged area. A bullseye is a classic example of this and it is only the outer limits of the bullseye that goes down to the laminate which is why it is a waste of time drilling into the centre a bullseye. However with a starbreak we have radiating legs going in all directions these will reach down to the laminate along most of their lenght. If when you flex a leg it opens slightly this is telling you the legs is opening on the far side from where you are pushing, for example the laminate surface. Some legs and only a few may close this will be legs that are also broken and open to the surface, there is a very slight possiblity that some of thses might not reach down to the laminate. It is very interesting to view damage from a side on perspective and you will see all that I am trying to explain. You will need a practise glass for this, just make some damage and look through it from the side of the glass. We find this totaly enlightening for most trainee's we get in.

[GlassStarz]

Screen
When I was over there in the 80,s (Mildenhal RAF) if we bought a car while stationed there the glass had to be replaced prior to shipping it home the Saftey glass was different it was laminated but different than what the us saftey standards allowed now that was 20+ yrs ago I assume things are different?

[screenman]

What sort of car was it? we did have a time in the eighties where some manufacturer's were making glass slightly thinner to save weight supposedly but other than that I know of no difference. However we also I think were not marking our glass properly so this might have been a problem.

[GlassStarz]

TR-8 They made them change the Windshields

[screenman]

TR7 with a V8 not a lot of them left over here, it was Rover that was putting the thinner glass in as far as I remember.