I thought it was damage or solder but now I'm not so sure

Azurescens

What am I looking at here

JBK

🤨

How could that have happened at the mint? 🤔

How could that have happened outside of the mint? (Flattened rims, bubble in the clad likely caused by high heat, overall roached appearance from whatever caused the other damage, etc.).

That's the way I see it, anyway. 🧐

johnny9434

im going post mint damage

ChrisH821

heat

PerryHall

@ChrisH821 said:
heat

Agree. That coin was in a fire or someone was playing with his torch. Heat on a clad coin can cause that bubble effect.

Azurescens

@PerryHall said:

@ChrisH821 said:
heat

Agree. That coin was in a fire or someone was playing with his torch. Heat on a clad coin can cause that bubble effect.

Oh cool, didn't know that. Thanks guys.

PerryHall

I've never seen it explained but my theory is there may be some air trapped between the clad layers that expands under high temperature that causes the bubble to form.

Glen2022

I THINK HE HAS A SEVERE COLD

World67

MarkKelley

High heat causes the gas to expand and the metal to soften. Voila! A bubble.

Mr_Spud

🤔. 😉

TallahasseeCoinClub

Heat treated which can cause the clad layers to bubble up like that.

jmlanzaf

@PerryHall said:
I've never seen it explained but my theory is there may be some air trapped between the clad layers that expands under high temperature that causes the bubble to form.

You don't need air trapped. The difference in thermal expansion will cause the metal to buckle. The air fills later.

emeraldATV

@jmlanzaf said:

You don't need air trapped. The difference in thermal expansion will cause the metal to buckle. The air fills later.

.

.

?

CaptHenway

@jmlanzaf said:

@PerryHall said:
I've never seen it explained but my theory is there may be some air trapped between the clad layers that expands under high temperature that causes the bubble to form.

You don't need air trapped. The difference in thermal expansion will cause the metal to buckle. The air fills later.

I disagree. I have seen a lot of fire damaged clad coins over the last 60 years, but only some of them have been blown out like this. The logical explanation is that only some of them have trapped air bubbles that can expand under extreme heat.

PerryHall

@jmlanzaf said:

@PerryHall said:
I've never seen it explained but my theory is there may be some air trapped between the clad layers that expands under high temperature that causes the bubble to form.

You don't need air trapped. The difference in thermal expansion will cause the metal to buckle. The air fills later.

The OP's coin shows an isolated bubble rather than buckling so this explanation makes no sense.