S100 with strange spots

[Hålta]

I received the entire delivery of S100 insulation with an appearance I haven't seen before. All the boards were full of gray spots. These were probably from a previous production of S100 of graphite quality. In the transition between gray with super quality to white S100 with standard quality, these spotty boards appeared. Is there any risk that they are not as good or durable as regular S100? Should I complain? Are they second-rate? Would major construction companies like PEAB, NCC, etc., have accepted these boards?
Please advise on what I should do!

 

[MaZtoR]

There is a similar thread somewhere here on the forum. With a few pictures of the insulation. Unfortunately, I don't remember what it's called or what the conclusions in the thread were. But you can try to find it.

 

[MaZtoR]

Found another thread.

http://www.byggahus.se/forum/byggmaterial-byggteknik/216379-svartprickig-frigolit.html