Here is something that I’m curious about. Growing up in the 90s, like many kids, I really liked glow in the dark things. My first yo-yo was a GID Fireball, which I still own but it’s broken - I managed to find an exact 1999 one NIB last year.
GID things all looked the same to me in those days. Slightly translucent off white with a hint of green to it. They were very consistent in appearance.
Now I feel there is a lot of variation in the appearance of GID products, particularly yo-yos. Like the YYF GID yo-yos almost look like a light lime colour whereas as the new Duncan glows are almost stark white (beautiful).
I know that most modern glow products now use Strontium aluminate as the glow pigment where as it used to be made with Zinc sulfate. I’m not sure when they started mostly switching out pigments.
Does anyone know why GID things vary so much in appearance these days vs. the past?