I no longer have the instruments to measure the absorptance and reflectance of materials; but, most optical instruments have black paint on the inside walls. A new source of very black films or sheets could be a useful addition because, over the years, the paint turns grey.
On 5/30/23, MSF <foster...@protonmail.com> wrote: > I haven't the equipment or the time to measure the degree and spectrum of > the "blackness". Suffice it to say, you can still see a very dim spot if you > shine a variety of lasers of different wavelengths onto the surface. > Naturally, the substrate, PET film, heats up and burns when you do this. > > I made this material in 2013 and there has been no noticeable change in its > properties since then. > > Fabricated by a continuous process, this film could be made for a few cents > per square meter. A machine designed for this specific application would > cost about 6 million dollars US. > > I would like to be more specific, but this material was made under an NDA > with a large semiconductor company and I'm not sure if this application > would be covered under it. > > ------- Original Message ------- > On Tuesday, May 30th, 2023 at 2:33 PM, Andrew Meulenberg > <mules...@gmail.com> wrote: > > >> depending on its degree and spectrum of "blackness" (and cost?), it >> could have many applications. Did it retain its properties as the >> oxide grew? >> > >
