On these hash boards, one side has regular extruded aluminum, that is aluminum colored. These knock off easily, when struck from the ends s having a black pad/film over the tiny chip. The otherside has slightly smaller chips that look like they are chrome or stainless steel shiny. These are glued/ soldered directly onto a traced design of gold. These are hard to knock loose, and occasionally rip the copper layer. All of them will pop off with a hard blow with a hammer, removing the entire column or most of it with one or two blows. If struck from the side, they tend to hang tight and bend the heat sink rather than popping loose.

Just talking to myself.
Just talking to myself, but you are welcome to listen in while I ruminate. What I have to say probably will never have any relevance to any board you may encounter other than hashboards.
If you have read my posts on the search for an easy method of knocking off the 120 heat sinks from each board, you know I jumped in headfirst without checking the depth of the water. Belly flops and headfirst dives didn't get many boards cleaned. So, the past few cold frosty days gave me a chance to cool my fevor and contemplate. The boards did clean easier when they had been out all night in 22 degree weather, but Pinky, Pointer, Tallest and Ring complained that the cold made them all thumbs, barely able to function.
So I agreed to move the set up indoors. Got my vise on a stand, right beside my rock saw, so I can clamp in a rock, and listen to the music of diamond blade singing a lovely rock tune. And while the saw is sawing, I can be whacking aluminum heat sinks (I know some of you don't believe in double tsk-tsking, that I should concentrate on one job at a time.)
Once indoor with my setup sitting there all sat-up, , I grabbed a two pound sledge to beat the holdtight off the board. Quickly I realized that was a lot of work and hard to control. It just so happened that there beside the work area was a drywall 8 inch blade(been so long since I did construction that I have forgotten what it is called.)
I grabbed it, put a board on the vise for solidity, and tried to chop down. Didn't work. So, I held the board in my left hand, and since I had another hand left over, I held the drywall knive by the handle, like it was a hammer (a really narrow hammer) and with the board tilted a bit vertically, whacked the columns of heatsinks, which popped right off. In five to ten seconds, one side of the board was clean, and the heatsinks collected in a plastic tote.
The sinks on the other side of the board are a bit more difficult, so for now, I am doing the easy off side.
It no longer seems like an endless project. I think I can clean the 1800 boards on one side in only two breakfasts, if I skip my minimum daily requirement of naps.

Not only am I talking to myself: I'm replying to my own comments. In less than half an hour, I had a plastic container, also known as a garbage can, with 60 pounds of extruded aluminum clips, or about 40 bucks at local prices.

Reading the post before last, I started imagining you as Genie from the animated Aladdin movies. (Think it was your choice of saying ruminate) so now your voice is Robin Williams' in my head.
¯\_(ツ)_/¯

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Here to learn more so I can recycle more
My grades are my own opinion and not an official grade from Boardsort

I had Deadpool in my mind.

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