Received my order today, i just ordered thursday, so shipping is really fast.
My order came well packed and in a sealed ESD bag, the quality of the items and packaging of LED4POWER is top notch!
A little bit thicker (and stiffer) bronze spring with the 12x9mm dimensions and measured ~7.8mOhm of resistance (right one in picture below next to the 11mOhm 1.0mm wire spring):
mosX material can't be used for DIY because there is layer of titanium above ceramic on which copper is electroplated. You can't etch titanium with anything that's not terribly dangerous for DIY.
I tried to etch it with standard FeCl3 solution and it does remove copper layer but titanium layer stays.
My manufacturer said that they have problems with sourcing this material so batch of 16/20mm mosX/aluramic boards for IR LEDs is probably my last of this kind.
Does the supply shortage mean the “standard” MOSLED will be gone too?
ehh, just noticed my mistake… I meant the MOSLED, not the mosX/aluramic. I’ve been able to etch those with FeCl3 after removing the solder mask in select spots, although the bare alu needs to be masked off too. (It goes faster than the copper!)