Have you noticed a change in clear LEGO bricks recently? More and more LEGO fans have commented on perceived changes in the clear materials used for certain parts, and they have called attention to it through forum posts and social media conversations that I’ve seen. Most noticeably, the comments center around three changes compared to older transparent elements: a slight color shift, slight cloudiness, and easier scratching (in the case of the windshield for the Ecto-1, set 10274). Far Right: Cellulose Acetate. Others: variations of PC (Image via Istokg on the Brickset Forum) So let’s talk about this recent shift in transparent LEGO—from the perspective of plastics! This article is not meant to be a deep dive into the history of clear plastics used at The LEGO Group (TLG), though I will briefly touch upon that now. The Clues for a New Clear For context, TLG has been making clear parts...

