I have not tried it yet, but can bl. diode cut through bl. acrylic or other things bl.? I saw several photos of things that got burned up in a fire, but everything bl. in color was not harmed! patio umbrella, boat, car and a few other things, one was a house.
Just curious here, but what is B L dot ?
sorry = blue, meant to put Bl. like rd=red, y=yellow, gr=green, bk= black, I get hung up on electrical colors! (LOL)
In principle yes, it’s just a matter of the power (and wavelength) of the laser. But, if you refer to normal standard diode lasers, which are up to 7.5 Watt, in principle only organic materials up to a limited thickness can be cut. By combining several diodes in a mirror or prism device, the performance can be increased to the combined value of the diodes minus losses in the system. However, it is still not possible to cut metal or glass because the wavelength of these diodes is not in the necessary range.
If you want to cut a house or car in half, you’ll probably have to borrow a laser sword from Master Yoda.
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Thanks, I hesitated between black and blue, indeed…
I am more in the graphic design side, with CMYK, so the k for black is a bit familiar, indeed.
@bernd.dk, it depends on the size of the thing to cut, I suppose… 
A Matchbox car might be cut with a fibre laser, I guess.
…Fiberlaser is again a different wavelength…, it might be worth a try, are there any volunteers?
…look, this is what I call a tool - Respect
btw, doesn’t really fit in my workshop
Well, provide me the fiberlaser, I will volunteer to test it on lot of material!
What is a matchbox car made of?
I’m not clear on what you are trying to deal with… I thought it was colored acrylic?
thank you everyone for your answers. the reason I was asking is that my brother showed me several pics on one of his fox news channels of the massive fire damage in Maui. Then I noticed that EVERY photo that I looked at that had an object blue in color was not burned at all. The pic of the blue patio umbrella was in someones back yard and the house, everything in the back yard was burnt down to the ground. There was a patio table, (round one with glass top) where you slide the umbrella pole down through a hole in the center of the table. The glass was shattered, the table frame was warped and melted and NO burning of the blue umbrella. Then Jimmy showed me a video taken by someone who used a drone to get video clips from above. I spotted one house that had several cars in the drive way with one blue car being blocked in by one car in front and behind. That blue car had heat scorched marks and soot on it, but the car never burned.
Myself, only being a 27 month nube here, have not tried cutting any acrylic yet. So when I noticed that things colored blue didn’t burn, (in Maui) I started wondering – what the heck??
sorry Jack, I should have asked about anything being blue.
oops, I made a boo boo. misread post answered wrong, sorry
You just didn’t see the other blue car or the rest of the blue stuff that was burnt to a cinder…
Color has nothing to do with it when a 2000 deg fire rolls through… Acrylic melts at 160 °C. (320 °f) … what does or doesn’t get burnt is fate 
yep - your right !!
If I had to wag a guess, I’d say the examples of “saved” blue items were hand picked to support a political opinion/meme. (Blue = Liberal/Democrat in US politics)
talk about hitting the nail on the head !!
I guess that means you will never fix it… once in the political system, we are hopelessly lost… with no fix in sight. 
They have become a dysfunctional family…
Nope. I have (2) 80 watt blue diodes and didn’t do my home work. They will not cut blue (light or dark) or white acrylic. It will etch them or more like melt a mm or so on the surface but that’s it. You need a CO2 or fiber laser for blue acrylic.
thats what I was thinking.