At a Glance:  Black plastic food packaging looks premium and hides things like excess sauces or grease, but it’s nearly invisible to recycling scanners.  The carbon-black pigment absorbs light, sending recyclable PET trays straight to the waste stream.  If black plastic happens to be sorted, there aren’t many end markets for it because it can only become other black plastic products — limiting the number of different applications.  Detectable pigments and new scanners exist, but high costs slow adoption.  Brands […]